Inside Twin Tower's Structure and the 911 Attack - Original World Trade Center
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- เผยแพร่เมื่อ 26 ก.ย. 2024
- The Twin Towers, which official name were 1 World Trade Center and 2 World Trade Center, were the tallest in the world from 1971 - 1973. On September 11, 2001, the two buildings got attacked by 2 hijacked Boeing 767, and later collapsed. 2977 people were killed. That was a very tragic day for the United States of America.
You answered more questions in 4 minutes than nearly any other full-length documentary I’ve seen about 9/11.
You beat me to it, I was thinking the same thing. Explains perfectly how the buildings failed and makes total sense
Propaganda
Good bot. You served your purpose
@@JustForRita good bots/ shills
The building collapses were not shown
I’ll never forget this day! I was in 2nd grade and my elementary school was on 77th street in Manhattan. I was 10 minute drive from the towers! I just remember my name being called on the loudspeaker telling me to go to the main office. My dad picked me and my sister up. I’ll never forget seeing both towers on fire while driving uptown. My grandfather worked in the tower and he overslept that day and didn’t go to work. We were all blessed to be alive still.
wow im trully thankful he slept in
Geez Bro! Hope you're ok today.... that's alot to absorb in Yr2!! I seen in live on TV in Sydney.. I had just left the Army & wanted to rejoin to go kick some butt in Afghanistan!
wow that is great your grandfather made it out. i was 22 and in London, with my dad and sister both in Manhattan, i remember calling them for hours to make sure they were ok but all the phone lines were blocked all day. but one thing: 77th street from WTC is a lot longer than 10min esp with NYC traffic!!
@@fernfunk I’m glad you and your family made it out as well! And you can make it down there in 10 minutes without traffic, I’ve done it before. I was speeding but I did it lol. with traffic of course not hop on the westside highway and you’ll be there quick
Damn the goverment nearly killed your poor grandpa
The smartest man was in the second tower who insisted his office evacuate, even though they hadn't been hit...that guy needs more press.
The smartest people left without provocation from others as soon as the first plane hit.
The smartest man will be the owner and his sons. He doesn't go to work, after attending all days. It's lucky or a smart person?
I hope those who prevented any evacuation from happening rot in hell
@@CarlosGonzalez-fh9sl Well they call him Lucky Larry for a reason!
@@MIS315 Who was preventing evacuation? I've never heard of such a thing
It's important to note the steel columns didn't "melt" but instead were weakened by the prolonged, intense heat from the fires, and thus lost their strength and ability to support the massive building-sized weight above them. Once the building-sized weight above the weakened columns dropped onto the main building below, the massive inertia force was unstoppable, and the building floors pancaked all the way to the ground. Nice job on the video.
Also the truss floor gave way first under the heat, pulling on the weaker outside facade and thous leading to the way the outside wall was pulled in before colapsing.
He literally said that in the video
Did u see recent China skyscraper whole building on fire whole day long, didn’t collapse. People are so easy to be convinced by something nonsense.
@@ironnads7975 No, he said the steel "melted" in the video. It didn't.
There is no way the mass of 15% of the building pancaked the other 85% of the building. Explain the explosions multiple stories below the "pancaking" and the fact all 3 building fell at free fall speeds. The 85% of the building that wasn't damaged till the top 15% fell on it would have at the least slowed the destruction and in the popping of thousands of structural engineers would not have destroyed the entire building. It take mass not inertia to destroy something. That mass was destroyed by the time the top half of the build was gone.
Also how does aluminum airplane skin cut through steel 75x thicker than it? Also without leaving anything on the outside of the building?
My greatest fear is hanging out of a window on the 105th floor and slipping or getting pushed out of the window. My biggest fear is falling from heights. I've had nightmares of this.
Same
When I'm near the window, it seems to me that someone is bout to push me out of there. This is a very scary feeling, cuz of which I'm afraid of heights.
It is a very scary thought, but you likely wouldn't feel any pain. And if you did, it would go away very quickly. Falls from such a height are not usually survivable and usually result in instant death. There have been very rare occasions where people have survived falls from extraordinary heights. Part of me thinks that those people that jumped experienced relief from the heat and smoke and hopefully were at peace.
@@revokdaryl1 No way. You absolutely would feel pain from a fall like that. But you'd likely be dead within a split second so it wouldn't matter.
I had a nightmare where I fell from mount everest. Absolutely terrifying.
The story with the third staircase in the South Tower is sad. Even though it wasn’t blocked - it had some debris and flames in it that made it look blocked/dangerous to most people. Only 5 people managed to realize it was still passable (one of them actually called the police & told them about it twice before the collapse, but in the chaos the information got lost). The other survivors who managed to survive above the impact zone were in the Skylobby, which was directly where the plane hit. So it was below where the stairs falsely appeared blocked. There were hundreds of people in the lobby, and 14 who survived the plane hitting & were uninjured enough to move managed to escape.
Um, I think you have some errors in your information. The South Tower was hit between floors 78 and 84, so the Skylobby was the lowest point of the South Tower's impact zone. Those fourteen survivors you're referring to were at the lowest point of the impact, not above it; and most were severely injured from the plane's impact. There were three survivors from the offices of Euro Brokers on the 84th floor and one survivor from the offices of Fuji Bank that was rescued by one of the survivors from the Euro Brokers office. I've studied 9/11 for 16 years and am familiar with the impact survivors' stories. I do not know anyone who survived the impact in the Skylobby that was not severely injured, because every survivors'story I heard from the Skylobby stated the severe injuries they sustained. Pretty much the only person I know who wasn't severely injured was Kelly Reyher. Also, who is this survivor you're referring to that called police and told them about the stairway?
@@historywatchdog2923 That’s exactly what I said? The Skylobby was at the point of impact, not above it. And so Staircase A didn’t seem falsely blocked. The 14 who managed to escape were from those not badly injured enough to be unable to walk/move.
Brian Clark and Stanley Praimnath claim to have called 911 on the 31st floor. One of the things they claim to have mentioned was that they took Stairwell A down and it was clear.
@@HW-sw5gb OK, it sounded like you were saying that the Skylobby was above the point of impact. Also, Clark was actually calling to report a serious casualty on the 44th floor Skylobby. They ran into a security guard watching over a semiconscious man with serious head injuries and the guard told them to get a medic and stretcher to the 44th floor, and that's what Clark was calling 911 for. I heard the audio of the call and I don't think he mentioned anything about Stairway A being passable through the point of impact.
@@historywatchdog2923 Okay, I think I found the article where I remember hearing it from
“The phones were working in Oppenheimer's offices on the 31st floor. Clark was on the telephone for over three minutes and talked to three different people before his 911 call was understood. This call might have been the only chance for rescue workers to learn that there was a clear stairwell that the several hundred people trapped above the impact could try to use to escape. ”
@@HW-sw5gb Yeah, the information regarding Stairway A is debatable, because we know Orio Palmer was able to make it up to 78 via Stairway A, however I've read articles saying the transfer corridor on the 82nd floor caught fire at some point, rendering the stairway impassable. Whether that happened is still up in the air and we may never know as the towers fell but I remember reading things and hearing eyewitness accounts that Stairway A was only passable to a certain point through the impact zone before eventually becoming impassable.
I have watched many videos about what happened physically to the Towers upon impact, and I gotta say this is the first time I saw a clear and concise illustration that helped me to visualize accurately. You answered all the questions I ever had. Thanks much for this video
It was a set up Demolition
Yes this was well done but not completely accurate. There were no columns in the core or otherwise that melted. Temperatures were not high enough to melt steel. They were high enough to cause even those massive steel columns to lose as much as 90% of their strength though and that is what caused the collapse.
Once the floor trusses succumbed and dropped, leaving the Outer Perimeter Column Wall without lateral support for a long enough span and those columns reached critical temperature, they folded like knees dropping that enormous building section above just 2 to 5 stories, hammering the structure below with 12 times the force it could withstand and initiating an unstoppable "global" collapse.
It was a horrible and tragic day but absolutely nothing unexplainable or untowards happened on 9/11.
Once those aircraft struck, a total collapse was imminent and those that understood the WTC Tower construction knew it.
Never forget what they did to us and why.
RIP to all those lost and God bless their loved ones and God bless America.
@@holdernewtshesrearin5471thank you for your informative reply.
@@YallaMiami - brilliant, numb- knuts, Just brilliant. And there were SEVEN buildings in the WTC complex that were destroyed and quite a few others.
But how could you possibly know that? It's not like that info is at our fingertips.
And btw. Atleast acquire a physics education before spouting off about what can or can't occur, sport. You come off sounding ignorant and arrogant, like a, well, like a "truther".
@@YallaMiamiwrong. Fire don't melt steel.
Not matter how much you think it does
This high quality video finally answered two important questions. 1 Why they collapsed. 2 Why people trapped in the upper floors never had a chance to escape. I can still visualize the second Boeing hitting the south tower.
An excellent longer documentary was made with more detail about the fireproofing on the steel beams and trusses and how they weakened with the heat. They interviewed the original architects and engineers. I believe you can find it on YT.
@@CPAndy-x5x I lived in Seattle for most of my life. The original architect also designed the IBM building in downtown Seattle. Same design.
You never had those questions. you pretend being a "bad conspiracy theorist" who "found the correct path". This video answers nothing and repeats the typical "jet melted fuel steel beams" narrative.
@@marble25 Not melted, just weakened to the point of failure. Relax.....
You could figure out all that in 20 years? Damn! you mentally challenged.
Nice presentation!
One correction 3:43 There's actually no evidence of any steel columns melting; they were heated very hot & weakened substantially, but did not melt.
Its just an educated guess
It is the all too common problem of an overly liberal and imprecise use of "melted".
well either way the beams still became weak and weren’t able to hold the upper floors
Correct.
Besides, jet fuel was only a minor factor.
The major factors were:
1) A giant 2 story hole at the sides of each building. 30% structural support is compromised.
2) The upper weight of the building V.S the compromised impact zone with a giant 2 story gaping hole.
3) Weight redistribution is compromised. The area with the hole needs to redirect and shift the weight load towards the core.
4) Jet Fuel had already evaporated since initial explosion during impact so there is no more jet fuel anyway.
5) Fire is fueled by the office furniture, aluminum from the plane and other metals and other debris.
6) The continuous heat even at a fluctuating 1200 to 1500 degrees was still warm enough to weaken, warp and bend 0.25 inches of steel column (upper columns were 0.25 inch steel shell slabs) holding up 10s of thousands of tons of weight over the impact area with the hole.
Note: The "molten steel" dripping off the towers were molten glass and other metals "cooking" inside of the furnace where the planes exploded.
they werent very hot. it was a kerosene fireball that disappeared in seconds then had air cooling
It took 20 years for me to understand how this happened unbelievable. You explained it perfectly
Sarkasm Off😉
You gave a clear explanation of what happened to the buildings, and why one of the stairwells in the South tower remained available. Thank you!
No explanation at all
Just regurgitated propaganda😂
Just accept the fact that the Jet Fuel in these 2 planes was the strongest and most powerful jet fuel that our history witnessed!
It was able to knock down not just 2 steel frame structures, it actually knocked down 3 of them! And on top of that 2 if these buildings fully pulverized and vanished.
Then it kept on burning for 100 days after the collapse.
It was so powerful it simply broke all Physics Laws
@@YallaMiami It was so powerful it broke physics laws LMFAO
That's the dumbest thing I've read in a looong time and you win🏆
😂😂😂
@@YallaMiami jet fuel doesn’t need to melt the steel, it just needs to heat it up to the point where it becomes more flexible. Heat also makes steel expand and contract like crazy. That’s what caused the collapse, not sure why that is so hard to understand with you people. I’m a welder and work with hot steel everyday I know exactly how this works. If you don’t know what you’re talking about you should simply not say anything at all.
@@Savagebab Larry Silverstein would love your argument 😂.
The towers literally pulverized and you still arguing that 2 planes did that.
I was 35 when this happened. I wept on and off for two weeks following the attacks. The shock of it all, changed me forever. A profound sadness that only those old enough to understand the enormity of what happened that day can understand.
Yeah I was 18 when it happened. And I feel totally different about the day now at 40. I didn’t have the maturity then to fully grasp what was happening.
@@00st307-m I'm 19 and still can't believe what happened that day and thereafter. Truly catastrophic. Unbelievable. The fact that I wasn't even alive when this occurred makes it even more unreal to me. Fiction almost. Knowing that myself and the victims of 9/11 ceased to exist is a strange thought indeed. Regardless, it's the only thing that relates us.
@@00st307-m I was 16 and the whole event didn't even phase me at the time. I was not and still am not shocked that this could happen, when before 9/11 we still had in recent memory stuff like the previous WTC bombing, the OKC city bombing, also the Unabomber. All had the common theme of terrorism, which made 9/11 just not all that shocking for me. However I didn't truly understand the scale of the destruction of 9/11 at that time, even after hearing the casualty reports that were coming out. For some reason it was years later before I really started to grasp how bad it was and the enormity of the whole thing, and learned even more details about the events of that day.
I was 12 sad day
th-cam.com/video/UIGBMTXpwH4/w-d-xo.html&ab_channel=JustBrowsing
Sadly, with one stairwell open the people above the impact zone thought they were trapped when they really weren’t. A few survivors made it past the impact zone. And one firefighter went up the stairs past the impact zone.
How to save their lives?
Step 1: I have to tell George W. Bush because he wants to see my old video talking about what's happening on 9/11, but I use a VHS Camcorder instead of an iPhone.
Step 2:
Towns and Pentagon must close from 5:00 AM to 3:00 PM on September 11, 2001.
Step 3:
The immediate military will cause terrorists in Iraq after World Trade Center is destroyed.
Step 4: Invent a Time Machine
@@juan1256robloxiphone? It was 2001 they didn’t exist
@@maxd4968 No I said VHS Camcorder instead of iPhone
22 years later & I still can’t believe this happened 😢 rest in peace to all
I was in a plane that had explosions
i still cant believe it
@@victormelendez2124 I was in a plane that had explosion
@@jewishtelabib3728 what how was the found out ? Did you let her later found out???
@@victormelendez2124 I jump in pont of new york
That rendition is quite amazing, considering what I witnessed.
I didn't see the first plane, except for the replays from the news, but within moments of watching it... I watched as the 2nd plane collided. I was 20 and in the Army. The part that sticks with me the hardest, was watching people jump to their deaths, knowing there was no way down and a fire will soon consume them. You don't realize at first what you were seeing, but then when it hits you what's happening live... people just leaping to their known deaths.
I remember a good part of life, with the Twin Towers. In movies, video games... it was as New York as The Statue of Liberty.
Watching them fall that day... gave many Americans a PTSD, that Pearl Harbor didn't give. Watching Live, as our country felt seemingly under attack. From unknown sources, for an unknown amount of time. I'll never forget that day, as long as I live. I'll remember it as if it happened a week ago.
"The part that sticks with me the hardest, was watching people jump to their deaths, knowing there was no way down and a fire will soon consume them."
I've often thought about that over the years. I can't even begin to imagine the horror those people were faced with, when making a conscious decision to jump was the better option.
I feel really sorry for you and every American.
Oh my god. I feel so bad for the people who died in the elevators
Same here.
I remember watching all this live never will forget it
@@jessealbertson8187 unjust Karna I'm afraid
Some people in elevators survived, surprisingly
@@MikehMike01but what about when it the building collapse
I was there in 2001 (August) and I'm still looking at these videos today..
today is september 11 2022, man RIP to the people who died that day
Your a day early.
Twenty four years of searching , 90% of the bodies never recovered
As others have said, you answered the main questions about the integrity of the building and in a very concise way. Many people don't realize there was an intact stairwell in the South Tower that could have been used to escape. It's sad that more survivors above the impact zone didn't realize this. I'm only one, but have subscribed - they all add up.
There was smoke in that staircase and people turned back to look for another way out. The Man with the Red Bandana gives pretty good background on that stairwell.
@@mryett You believe what you want to believe regardless of evidence to the contrary. You're an excellent example of 'confirmation bias' Watch Brian Clark's account available on TH-cam. A 9/11 Survivor's Story - Brian Clark
th-cam.com/video/UIGBMTXpwH4/w-d-xo.html&ab_channel=JustBrowsing
People please obey God's Ten Commandments otherwise you will be judged soon as well😢
One of the survival stories from south tower says that people were exiting down one of the stairwells and were about 5 floors below the crash zone so where was all the jet fuel gushing down the stairs on top of them ? obviously most of the fuel blew straight out of the opposite side of the buildings in both cases.
Bruh I recently watched a video about people calling their families to say goodbye, or even having panic attacks on their phone while in a call. And moments after, when the tower collapsed, you could hear their terror before the line cut off. I actually started crying after hearing them....
Demolition blues
I will never forget still having to go to a luncheon work meeting that day when we knew we were under a terrorist attack and didn't know what else was to happen. On my way home from work that day I was still in shock and saw people just behaving normally, mowing grass, jogging etc and I couldn't understand it. I cried for at least 3 months straight. TY for explaining this.
When I left work that day (I was in midtown,) I took metro north home. It was maybe 4pm (they wouldn’t let us leave earlier,) and there were maybe only two other people in the train car with me. It was eerily quiet. It was numbing.
Same. We were not let out of work either, and were supposed to continue as if we weren't grieving for those who were going through hell and also scared out of our minds!! Some people were just talking and laughing as if it was just a regular day. I couldn't believe my eyes and ears!! I wish I had just left work and gotten my son from grade school. That was crazy. I'd do it differently if I had the chance to go back. Not that I want to. 😢💔😢
This was very straightforward and to the point, with useful animations. I've watched many, many hours-long documentaries that didn't include everything you did here. Great work.
Great animation, especially cause we don't really have good video of the first crash, so this makes the perspective available to us.
@Jake Korol lmao god bro, get a life
@@mattmammone2338 I was 5 blocks away in class, flight 11 went right over our school. It sounded like the loudest car crash ever. We all thought it was a car crash on west st (only cause we couldn't have imagined it was a plane crash into a building). Comingnout of class and looking at the north tower burning was the most incredible thing I ever seen in my life.
я так и не понял, почему жалкие самолетишки из аллюминия ну хоть и с горючим, смогли сложить 2 огромных здания, которые построены с расчетом попадания в них самолета, самолеты врезались в верхние этажи, а не в основание, огонь не способен расплавить все несущие балки, посмотрите на любой пожар здания, где горит крыша, крыша сгорает фундамент остается, и я про простой дом говорю
Most well made video on this horrible attack. This probably is one of very few videos that keeps new generations informed on what really happened that terrible day.
Even those of us on other continents were traumatized by that day.
I remember coming home from school early because it was such a sunny and warm September day. Just getting ready for supper. We always had the TV on, and then an emergency new update. The first tower had already been hit. Then only a while after we saw I live.
I remember walking outside and in complete disbelief just felt numb. When realizing people were stuck it just became a mental torture. But we were glued to the tv. It felt involuntary.
The whole world felt this day.
Then came the response.
22 years later, didn't undersatnd why the 3rd and the 2nd law of newton didn't apply this day.....
how 22 floor found the force to destroy 80 floor by the simple force of gravity and at the same time continued to accelerate to the speed of free fall as if no force below offered resistance
Very impressive video... VERY few people thought the whole building would collapse after the initial impact ... Probably thought it was so big that it would not collapse. Weak floor trusses sealed the fate of the building. A chain is only as strong as the weakest link.
Thank you for this video.
I did.
Your wrong it was a controlled demo your only saying that because the government and the media told you it was hijacked planes that brought down wtc.
it had nothing to do with weak floor trusses as your forgetting resistance when one floor hits the the other it slows down not maintain or gain speed it goes against physics. the buildings were 110 storeys so it should of took roughly 110secs to collapse but it took 10-12 secs that's 10 storeys a second are being destroyed thats impossible without explosives. theres plenty of testimony of massive explosions going off all over the towers way before both collapses..
@@acostin4004 - Your explanation is incorrect. Indeed, you have it exactly backwards.
Collapse initiation mechanisms are in fact visible to the naked eye. The sagging floor trusses can be seen. They were photographed. We can also see the inward bowing of perimeter columns by up to 5 feet until they buckle. When those perimeter columns buckle is when the collapse begins, when the mass above starts to drop. As it does so it transitions instantly from a static load to a dynamic load 30 times greater.
Thousands of tons of debris falling through the open office space is going to come crashing down on the top intact floor. That floor is not designed to take anything like that kind of load. Only the weight of people and furniture that would normally occupy that floor. The two 5/8" bolts at each end of each floor truss instantly shear and the floor fails, ADDING ITS MASS TO THE ALREADY FALLING MASS.
This process keeps repeating all the way down until there is nothing left. As the falling mass increases, its momentum increases and the rate of collapse also increases. We know it increases. It can and has been measured. The data has been published.
Like I said, you got it exactly backwards.
All of that has fuck-all to do with who did 9/11, how or why and thus is true no matter who did 9/11, how or why.
This dogma you have come to accept as gospel that it had to be pre-planned (never understood why it had to be "controlled") demolition, so that way it can't be terrorists is Chimpanzee-part-of-the-brain (non) thinking.
And no one looks good flinging poop.
I sincerely hope this helps.
You keep telling yourself that.
Physics 101
Asymmetric damage = Asymmetric failure
Very well made video. You packed a lot of useful informations in less than 5 minutes. Impressive.
The worst tragedy in my lifetime. I remember, I couldn’t believe it was happening.
Tragedy that was worse is when y’all killed 1M Iraqis
@@fortnitemove9834 Who is y’all? I didn’t kill anybody. But yeah the people that were killed in Iraq that was a tragedy too.
@@KevinMahomboy I means as in america and patriotic Americans who were like puppets of bush.
And it isn’t a “tragedy too” it was like a 166 9/11s in terms of civilian casualties
@@fortnitemove9834 Not really trying to have back in forth. Let’s just say the whole time period was tragic and a lot of people lost their lives, which is a very bad thing. I witnessed this first hand, that was my point. Not trying to draw a what’s worst equivalency. “For me” 9/11 hits a little different when your personally blocks away in Harlem. My experience isn’t everyone’s, it’s just how I experienced, that particular day.
@@KevinMahomboy ah ok I get you. Well, you’re honestly right. Arguing and just going back and forth does nothing but leave everyone pissed so I’m honestly just gonna respect your opinion and say I was in the wrong.
Have a great day dude!
This is as much info as I’ve gotten from 10 other video’s separate, thank you for explaining so well
I'll never forget watching this on live TV. Seeing that 2nd plane hit is permanently etched in my mind. I was in 2nd grade then. I don't remember alot from 2nd grade but I'll always remember this.
Same bro! I was in 2nd grade also and I was in NYC to see it live! My elementary school was on 77th St in Manhattan so I was a 10 minute drive from the towers. My dad picked me and my sister up from school when the first plane hit. I’ll always remember seeing both towers on fire while driving home.
I was also in 2nd grade. I'm from upstate New York, and while I live a few hundred miles from the city, it's haunting to think that the events of 9/11 happened so close to home.
i was in second grade as well…watching that live south tower hit was devastating, the look on my teachers face knowing this was not an accident. scary…We’re by Detroit, In michigan and they still evacuated us and sent us all home. We didn’t know what was next after this and the pentagon.
@@Doctrinedarkk thats powerful man. Thanks for sharing
May all Those Souls Rest In peace.😥
Terrorist including?
Great video...and true also. This is why tower 2 fell first. It was hit at a lower point, thus the weight above the impact point is greater.
It also hit at an angle, so not only did it take out the exterior columns of the tube structure on the side it hit, but the right wing cut through more colums on the east side.
@Bagenius: It also caused a very large explosion
@@matthewcollie6936 Ummm, both planes caused a very large explosion in both towers. Great observation, Sherlock.
@@isaachannigan920 it kinda did if you look closely at the upper part of the south tower just as it started to fall, you can see it tilt to the side quite significantly before the dust and debris cloud got big enough to obscure it
@@isaachannigan920 gravity most likely
Thank you for putting it in that perspective. That answered many of my questions.
This is an excellent video and explains things I hadn’t seen elsewhere. Thank you.
Only critique I have is how you described some of the steel beams had "Melted" due to the heat. This is not the case because the heat from the fire was never hot enough to melt the steel. It did however soften the steel at around 750°c causing structural integrety to weaken beyond hold.
He did not mean it in the literal sense and I agree the term is too loaded to use casually.
@HirnExehow would you visualize weakness in a still intact structural beam?
@HirnExe because melting and weakness are two different and misleading things. im not saying it wasn’t causal but i am saying that there is a way to visualize melting and a way to visualize weakness onset by long exposure high intensity heat. i asked it because i thought the visualization was a very good way to show that the structure was compromised in a way that didn’t necessarily mean melting
@@MFitz12 Please don't excuse the error on those grounds. In a serious context like this, there should be no difference between what is said and what is meant. If the beams did not melt (they in fact didn't) he should not say that they melted. It's that simple.
@@dixonpinfold2582 - Video is intended for a non-expert audience.
Awesome video. I don’t even know how I found this but I’m glad I did. Loved the diagram showing how the stairwells were cutoff and how the building steel melted. Excellent video.
He didnt show how they melted. Jet fuel cannot melt steel.
It's incredible they held for as long as they did given the insane structural damage.
Yeah, very poorly designed to withstand it.
It's September 11 today, and this is such a big historical event
Your video is clearly the best model demonstrating the towers' construction techniques & how they were compromised during the 911 attack. Simply excellent work!
Only that it doesn't follow physics principles... Only a controlled demolitions explain how it could colapse that way.
@@joseppurroy6978 show us video of all these explosions going off at each time stamp pin pointing the floors it happened on, since there were constant cameras all over these towers I’m sure you’ll have no problem finding a video where you can clearly see where the explosions went off. Oh wait, you probably will say you can’t it’s a “I heard it from Facebook so I agree with it”. You don’t know physics, shut up kid lol
you are E.D.ot...want some animation for it?
you are not using your brain. how did building 7 collapse in free fall also without jet fuel. how many steel building models have u seen fall freely to melted steel?
@@joseppurroy6978says probably some random kid on the internet who thinks he’s a master engineer
This is the most amazing and enlightening presentation of what happened to the structures. Thank you for making this. You are very talented.
it was a noob decision to build the towers vertically. if they had put the twin towers horizontally, many lives would have been saved
umm stop online hate pls. be rispectful on line. u are leser than most pls get educate@@imbetterthanu-gi9ej
Thank you for showing this and describing it. I always wondered what these building looked like and where the stairwells and elevators were.
Du hast vergessen die Sprengkörper mit rein zu simulieren.
Aber sonst klasse Aufklärung.
Exactly, and no mention of how building 7 fell in on itself all at once, especially since it was outside that protective slurry wall.
welche sprengkörper?
Very well done !! Concise and fact based. This was a horrific day for everyone. RIP all those lost. Forever remembered !!
Remember them.
FACT BASED ?
@@MrDaiseymay Yes, FACT BASED. Not based on conspiratard conjecture and nonsense.
@@MrDaiseymay Repeating the"facts" well !. They said half fell and pancaked the lower half. It's "science" One second able to support a thousand tons, next second support nothing. All 3 buildings just happened to fall in their own footprint at freefall speed. Just a coincidence that it's never happened before or since to a steal frame building to fail due to fire......... Only a fool would ask questions .....
@@nebtheweb8885 Repeating the"facts" well !. They said half fell and pancaked the lower half. It's "science" One second able to support a thousand tons, next second support nothing. All 3 buildings just happened to fall in their own footprint at freefall speed. Just a coincidence that it's never happened before or since to a steal frame building to fail due to fire......... Only a fool would ask questions .....
Y’all act like the buildings were indestructible
Thanks for doing this. We relive this almost every day. The towers' beauty also led to their failure.
Very historic.
This is the government's explanation, nothing new here. Beauty is in the eye of the beholder. The tower's "beauty" had nothing to do with its "failure". The building was engineered to withstand an airplane crash & that's on video btw.
@@shechshire it was engineered to even withstand over 4 plane crushes
@@Smile-ux6pm "engineered to" Oh so when they constructed them they knew that boeing 767's weighing up to 400,000 pounds, going 530 mph, and storing 90,000 Litres of jet fuel could hit the buildings at the worst locations and stay standing? Also a fun fact: "engineered to" doesn't mean guaranteed results in any way.
@@shechshire They were designes to withstand a 707 going at a cruising speed, not a 767 going over 300+ mph
Controlled Demolitions set up way ahead of time..
Nonsense. No point. No one would bother.
@@MFitz12 Dream On
@@harlow743 - My points are valid. Any sort of pre planned (never understood why it needed to be "controlled ") demolition of any building is pointless. Tremendous risk, cost and effort that is completely unnecessary, achieves nothing.
@@MFitz12 Neither does turning a blind eye to the facts....a military grade explosive (Nano Thermite) was found in the dust of all three buildings
@@harlow743 - That isn't true (on several levels). Even if it were true it would be irrelevant as no type of thermite was involved in the collapse of any building on 9/11/2001.
I was shopping in Covent Garden London watching it unfold through the window of a TV store. Crowds gathered in the street, we couldn’t believe our eyes. Madness!
Impressive video of the tragedy. Still hard to believe it happened, but nearly miraculous the buildings fell as they did instead of the tops toppling over and destroying many more buildings and killing even more on the ground. From what I can understand, these buildings were a victim of their unusual design. If that plane had crashed into the Empire State building it almost certainly would not have collapsed. Or many other buildings more traditionally constructed. If only they had fully evacuated the second building that was hit, The people above the point of impact would have survived. As terrible as it is, must remember that the vast majority of people did safely exit the buildings, though no comfort for the loved lines of the victims.
"unusual design" - are you really that gullible?
It wasn’t miraculous, it was by design. The towers were engineered to fall into their own footprint
A plane did hit the empire state building. A b29 in 1946 or something
If plane hit burj Khalifa will it collapse?
Still very hard to believe that it not only crushed the steel below it. But did so at FreeFall speed. Amazing
4 minutes is not enough!!! the VISUALS make this soooo interesting to look at!!!! i hope you create much much more like these
An incredible explanation and illustration of what happened to the buildings and their inevitable collapse.
You are truly an expert in presentation and production.
This was surely the darkest day in the history of terrorism.
RIP to all the innocent victims of 9/11.
That's the best animation of how the towers were built and why they ultimately collapsed. If you understand the basic logic as to how they were designed, then it makes sense why they collapsed straight down. The load bearing was done by the exterior walls and central column, it's not a grid structure like most buildings where the weight is equally spread throughout. In this case, the exterior walls were the weaker of the two load bearing structures because they werent encased in reinforced concrete like the central column. As the fires softened the exterior walls and the floor trusses, the floors began to sag and then started the pull the exterior walls inward. Eventually I think a couple floors just gave way between the sustained heat AND the weight of the collapsed floors from the initial explosion. As they began to collapse and rip off their mounts from the exterior walls, they pulled in the exterior wall just far enough to also fail, then with the weight of 30-40 floors still above it, they also buckled and that's when the whole thing starts to come down. The reason in my opinion it came straight down is because as the floors collapsed, the exterior walls effectively became detached from the rest of the building, and so it basically just "slid" down the central column which was made of steel reinforced concrete. When you watch the collapse of both towers, you can see windows exploding a few floors below the mushroom as it comes down. I believe thats actually the floors collapsing ahead of everything else and as they pancake onto each other, its forcing a huge amount of air through the windows which looks like mini explosions. That's my opinion on the whole thing anyways....
Just to clarify, there was no reinforced concrete anywhere in the twin towers above ground level, including the central core which was entirely made of structural steel.
The only concrete on each level was 4"-thick non-reinforced concrete flooring poured, and this was the source of the dust. The walls of the stairwells were made of sheetrock.
Watching this on the 11th... Rest in peace to all who died. 🕊️
I feel sorry for those who lost their lives from that event. 😢
Us too.
i feel sorry for the ones who survived the original impact not the ones who lost their lives in a split second!
i couldn't image the horrors of knowing there is no escape....
Jesus is not watching you
So beyond thankful my fiancés father was late to work that morning. He worked on 68 in number 1. He had a hard time getting down in 93 when he was in prime shape. He thinks it would have been a struggle that day.
You come here to rub in your finance father survived, what a great person you are
This helped me understand everything. Thank you. Also, the towers were supposed to have 6 stairwells each due to building codes, but a loophole wittled them down to 3 each. Just think how many people would have lived if they'd had those extra stairwells!
Every time I see a video of the engineering of the towers and their construction. I'm amazed at how fragile they were .
Oh yes they always build giant buildings to be fragile you didn't know that.
Whenever they show the collapse they leave out the forty seven columns in the concrete vault. I'm to assume those just melted away as well. Even though all the steel used in high rise construction is incased in a thick coating of high heat insulation. Oh yes and buildings always just deteriorate at free fall speed.
The moon is also made of cheese.
Make sure you take all your shots for the virus.
yes, very fragile when compared to bombs
well nobody ever imagined a 767 loaded with fuel smashing right theough them at very high speed, so in my opinion, they were not that fragile at all.
@@anastege11 by the way, if i am not wrong, they said that the twin tower could sustain a boeing 707 crash?
@@michaelowenchandras Looks like they were wrong.
Great video. Only one important thing to point out... the steel beams did not melt nor was it necessary to cause failure. They just needed soften.
I had this chat with the channel owner. He did not mean literally melt as in convert to liquid state. A common error of casual English that has trapped many a conspiracy nut. Taking literally meaning from statements not meant to be taken literally.
@@MFitz12 I figured it was a matter of translation judging by his accent. I made the comment with the intention of clearifying the facts before some conspiracy theorists trolls the semantics. My bad.
@@quaoar213 Its a fair point and the conspiracy trolls have noticed what was said.
And taken it literally of course.
@@MFitz12 they like to choose when and when not to take things literally in support of their illogical beliefs.... that's for sure.
@@quaoar213 Indeed.
The outer "skin" of the towers also acted as part of the structure. That being damaged by the crashes contributed to the upper sections collapsing. This is likely why the upper sections first tilted towards the crash area as the collapse began.
wrong. the buildings were designed to stand with the core only. they were designed to survive a 707 crashing into the facade.
@@Cjephunneh
1) The cores were also damaged, this is why very few people could escape from above the plane strikes.
2) There were claims that the towers could survive a plane strike, but this was under the assumption that the plane would have very little fuel onboard and flying slow. This was the scenario when the Empire State and 40 Wall St buildings were hit by planes. The planes were lost in the fog and trying to find a runway to land on. The planes that hit the twin towers were flying fast and still had most of their fuel load.
Both collapses occurred away from the impact point. The antenna on the North Tower (hit on the north face) tilted south and South Tower (hit on the south face at more off an offset) tilted northeast.
they did survive the crash it was the burning that made them fall. also fuel and materials only burn at a certain temp but the wind up there that day was about 15 to 20 mph steady adding fuel to those fires. like blowing on your camp fire trying to get it going, but dont take breaths just keep blowing for 30 minutes strait. @@Cjephunneh
@@Cjephunneh - which a 767 and a lot bigger, More fuel to burn etc.
Excellent coverage and recreation
Nice Video, but: a plane made almost entirely of aluminum (except for the engines) can't penetrate a single core column, let alone 46 of them. Even the architect who built the WTC says the towers have withstood multiple plane impacts.
Did you know that the columns were assembled from 30' sections bolted together? And that the jet's momentum was more than enough to break those bolts?
It's not steel vs. aluminum, it's an enormous quantity of energy vs. a structure not designed to withstand it.
Most of the core columns survived with little or no damage.
Both towers were still standing after impact so impact damage alone not sufficient to induce collapse.
One going 500 mp/h can..
aluminum or not, several hundred thousand pounds of anything going 550mph would go through beams like nothing. Look up fighter jet crash tests. A single engine fighter weighing far less crashing into a 10 ft block of reinforced concrete and nearly penetrated 8 ft
My guy I don't think any amount of reinforced material is gonna stop an aluminum tin can filled with jet fuel going 500mph from destroying it
When they said the planes for flying at 500 mi an hour at sea level, the wings would have tore themselves off the plane at that speed, in building 7 destroys itself with no planes crashing.
Planes fly at 500 mph (and faster) all the time. I don't know what caused you to think the wings would've torn off but it'd probably require hypersonic speeds. Also, building 7 burned as a result of the North Tower coming down on it.
Who told you the wings would fall off??? 🤣🤣🤣 You guys are hilarious! 😁👍🏽
Melt steel with kerosene, paper and wood etc? 🙈🙉🙊
Nope
WOW GREAT EXPLANATION OF WHAT HAPPENED. GREAT VID.
Imagining being on the plane is the worst. If you were on the towers you would’ve still had time to escape but if you were on the plane you had nowhere to run and the your fate is set. Death
no plane were in sight, CIA already sort every 911 video, spread rumor and edited footage
Yeah buts only if you know your going to crash, the people on the planes had no idea that they were going to crash into the twins towers or the pentagon, so they didn’t know what exactly was going on or that they were going to die that day, except for the 4th plane(flight 93), they knew about the high jackings and the other planes crashings, so instead of being scared, they bravely decided to try & take back control of the plane by attacking the high jackers.
Just imagine being on the 2nd plane and as you approach Lower Manhattan you see one tower already hit and on fire and then possibly immediately wondering if we’re about to crash into the other one
there were phone calls recorded from passengers. So they knew it, at least some minutes before the crash.
Wow, I wasn't even born when that happened.
I was 18 that year. Seems like yesterday only, but that was 22 yrs ago already. How time does pass!!
Thank you for letting us know.
We can’t lie we are living history right now. We’re living in a great period of life where things like this are possible. We may not be as far as we wanted to be but I’m glad I landed in this time period, rather then dying of unknown causes at a young age and having to fend for yourself against anything possible of killing you
Actually one person survived that entire area that was destroyed
Who?
@@YzuAiha Skrillex
2:43 That fireball that soars to the right away from the building after the impact is one of the plane's engines. Both engines passed though the building and were found blocks away, as did the landing gear. They are the heaviest and strongest components of the aircraft.
Just to add -as they are made out of the titan they are indestructable
really?? )) nice joke
and where are the engines of flight 93 in PA... or did they just "disappear" into a hole in the ground..... where is the luggage....seats ect... don't even get me going on the pentagon incident... windows which should've been taken out above impact both to the right and left of impact are untouched...???
Don't make me believe that a simple plane can bring down a tower like that in 10 sec without the real cause of the collapse being caused by controlled explosions from inside the 2 towers!
Depends on the size of the plane
It wasn't 10 seconds...it was more like an hour of fire working on steel that had its flame guard blown off by the crash. Why did you say "10 sec?"
10 sec of collapsing!!!!!
@@orionred2489
Theres literally no way that a plane could collapse in just 10 seconds, thats impossible!
I've watched the video that the two NYPD Brothers made that day which was originally supposed to be a documentary about firefighters. Many People heard bombs going off right before each building came down.
This was what I wanted to find thank you
I am not saying that I believe in any conspiracies, but I still find it hard to believe that the part of the buildings below where the planes hit collapsed. If it was like a 2.3 earthquake, they should easily have been able to handle that. It is just all very unbelievable.
The 2.3 earthquake was the measurement of the towers collapsing NOT the forces applied to the building below the impact zone... the forces applied to the building below was the upper section falling into it, its basic physics.
If we put aside the sentimental value, I must admit I like the look of the new building quite a bit more than the old ones.
I can agree. Before 9/11, a lot of New Yorkers did not like the design of the World Trade Centre. They thought they looked like big steel boxes that the Empire State Building and the Statue of Liberty came in it.
dam did not know that the foundation was so long it went to the bedrock
that my fellas is a minecraft reference but apart from jokes this is a very nice animation that answers almost all questions about 9/11
One of the saddest days to the whole planet and good people with big heart and feelings like me.
I agree.
so war where milions ppl died wasnt sad, just usa 2 towers?
A sad day it was, but if you think it was one of _the_ saddest you don't know a lot of history.
This does not explain why the towers collapsed. The buildings were damaged by the planes but would not have fallen without the many explosions that destroyed the base and lower floors.
You forgot to include the nano-thermate cutter charges, basement bombs and other explosives used, but it's a good fairytale painted : )
They didn't "forget," that stuff was omitted because it didn't happen. There's no such thing as a nano-thermite cutter charge, and thermite at the WTC, always a conspiracist's fantasy, has been debunked.
No, he only included the things that really happened, not bullshit fantasy nonsense.
@@MFitz12 ah yes! Because state sponsored false flags ONLY happen in OTHER countries, not here huh?!? Thanks 😉
@@aethanfriday3568 Your post is irrelevant hyperbole that does not address the facts of the case.
@aethanfriday3568 Do you know the amount of time, effort, and number of people it takes to bring down a structure half the size of the twin towers? Do know the tallest structure ever brought down by a professional demolition company is only 40 stories? Do really think that the hundreds of tons of demolition materials and pre-demolition work that needs to be done prior to implosion would not be plainly obvious to anyone working in the towers before 9/11?
Dang imagine if someone was in an elevator going down from that floor when the planes hit. That would of been scary to see it happen.
Truely. One of the most scariest ways to die
cool now explain how wtc7 fell at almost free fall acceleration without being on fire :)
It was on fire and did not fall at almost free fall acceleration.
@@MFitz12 wow thats crazy bc video would suggest otherwise
@@bongopaterson265 - No it wouldn't. I clock the collapse of Building 7 at roughly 20 seconds (or 7 hours depending on how pedantic you want to be). That is 1/3 the rate of gravitational acceleration.
The real problem is, few people understand what they are looking at.
@@MFitz12 Not sure what world you live in but 20 seconds for a 47 story high rise to fall is pretty close to free fall. Roughly .4 of a second for each story to somehow collapse in on its self🤣
@@bongopaterson265 - No. 6.5 seconds is free fall for a 47 story high building. 20 seconds is 1/3 of true free fall.
Did y’all hear about the man who climbed down on about nearly 45 floors before falling to his death
His fall was caught on video right? He was scaling the building, it's actually thought that some of the 911 jumpers weren't jumpers at all and accidentally fell to their deaths😢
Clear, short and straight to the point with no dilly dallying. Thank you this answered my questions about how they stayed standing for so long after the planes hit
The fact that this happened 21 years before
Bro who gives a shit about those towers
and that’s they say Never Forget, it has become a special meaning.
before what?
Rest in peace to those who died
I am so sorry to their loved ones
This is truly so heartbreaking
My respect goes out to them
Thank you to police officers, firefighters, doctors, nurses who tried saving another life including many more
Thank you to those who built the World Trade Center , you are amazing 🕊🤍
For the age that both towers had one would've thought they would come crashing down as soon as the plane hit. They stood tall for a long time even after the first hits and the fire spreading like crazy. Smart engeneering at the time.
It’s so terrible and truly heartbreaking for the family’s who lost loved ones. Hopefully the world can learn from this and that it won’t happen again
How are you going to say the "the world"? When it was the usa who should learn from this
@@Blizz247 what should they learn from? That some cowards hijacked two planes and killed thousand of innocent people who had no involvement whatsoever ? Oh so that’s fine but saying that this shouldn’t happen again is not? F off bro
It won’t, most likely.
@@Blizz247yes
Well they didn't learn from it. They had it coming and made worse.
I don't believe new pilots with 6 months of training can fly planes into buildings. It was probably remote controlled or on autopilot
Have you done any research on 9/11 at all?
@@Foolen_ and you believe everything the media tells you. 🤣
@@ravikurup8350 We saw it live and some of us have been in NYC. Did you have a serious point or are you just trolling? You're wasting server space with these cringe emojis.
@@dritemolawzbks8574 you're so simple.
@@ravikurup8350 You're the one still confused after two decades. I'm pretty sure you couldn't explain what happened.
You need to stay focused on finishing your structural engineering degree at Lego University.
The revolutionary new way these buildings were constructed was the primary reason for their total collapse. The decision to construct a central core for utilities, stairways, elevators, restrooms and a separate outer wall of steel beams with the floors hung between them saved weight and construction cost. It also opened up the floors and allowed for more office space. If they were constructed in the more traditional box steel framed method of boxes of steel on top of boxes of steel they would've been a lot more resistant to collapse. _“The heat from the fires weakened and caused the floors above to sag and pull laterally on the perimeter columns which bowed and then buckled. The vertical capacity of the connections supporting an intact floor below the level of collapse was adequate to carry the load of 11 additional floors if the load was applied gradually and 6 additional floors if the load was applied suddenly (as was the case). Since the number of floors above the approximate floor of collapse initiation exceeded six in each WTC tower (12 floors in WTC 1 and 29 floors in WTC 2), the floors below the level of collapse initiation were unable to resist the suddenly applied gravitational load from the upper floors of the buildings…,”_ and so under an ever increasing load they collapsed one floor after another cascading all the way down (from the three-year $16 million investigation by the National Institute of Standards and Technology). A box framed building is designed so all vertical parts of the frame can hold up the weight of the building above and would have made it more likely to have avoided a total collapse. In 1945 a USAF B-25 Mitchell bomber accidentally crashed in the fog into the Empire State Building between the 78th and 80th floors killing fourteen people. Albeit a smaller and slower plane than those that crashed into the Twin Towers this crash and subsequent fire did not compromise the box framed building's structural integrity. Although no one anticipated such an extreme scenario the Twin Tower’s original architects were horrified to comprehend the mechanics of the collapses after the tragedy on 9/11.
Why do you keep copying and pasting this?
@@MFitz12 For editorial reasons.
@@MFitz12 actually a lot of buildings that are still constructed that way
Yeah, and reasons why something like the Empire State Building was able to stand despite that was because it was overbuilt. That's not the case with the Twin Towers. Also, it was structured in such a way that when you lose one floor, a domino effect plays out.
As those who survived in the Miracle of Stairwell B put it, "You can hear the floors crashing on top of each other one by one, getting faster and faster."
if they had used steel beams for every floor rather than trusses, it would still be standing, too. trusses are shit in fire.
One correction: The steel did not "melt."
Controlled demolished, clearly seen
Nope. No evidence of controlled demo.
WTC2 collapsed just as it should have considering the weakened structural support and the BIG hole on the side - it tilted to the side where there was lack of support, and WTC1 pancaked because the plane hit in the middle. And how would it be controlled anyway? The buildings collapsed from the impact zones, how would explosives survive an airplane strike?
I didn't see it. Please elaborate.
@@ASpecialGuest The collapses of the towers took out buildings for a hundred yards in every direction. That doesn't sound very "controlled" to me but that doesn't stop truther nuts from saying it.
@@Tim22222 conspiracists will be conspiracists, they want to feel smarter
Very well presented
The amount of mental gymnastics required to justify this explanation is beyond me.
My heart goes out to all the victims. RIP❤❤❤❤❤
Damn the aim was pretty good
Great video: however, the fires were not hot enough to melt the steel; they were at least hot enough to buckle the columns and the trusses. Also, the graphics looked as if the tower's cores were made of concrete: this is not so. The cores of the Towers were wrapped in Sheetrock or drywall, which is gypsum board: thus, making it very easy for the planes to destroy all or most of the stairwells in each building.
FYI dude. Nobody ever said the steel melted!!
@@roquefortfiles You must not have heard the video correctly then. He clearly stated the core columns melted.
@@historywatchdog2923 Ok!! steel melts at like 4000 degrees dude. Do you think aircraft fuel burns that hot? The answer is NO!!! Sorry but the steel does not "MELT"
@@roquefortfiles I never said the steel melted! I know the fires weren't hot enough to melt the steel! The narrator of the video said the steel melted, therefore, that's why I replied to him in the first place. If you read my original comment, I told the guy that the fires WEREN'T hot enough to melt the steel in the core, but hot enough to soften it and make it bend like liquorice. I never said nor believed the fires were hot enough to melt the steel. I studied the Towers for 16 years and have always known this basic fact.
@@historywatchdog2923 Copy. Now we're clear
Ppl still swear this was a conspiracy to hide money or start a war but the planes jet fuel bringing down the building was not. You can see from the video the building fell from the top down. If it was detonated it would have fallen from the bottom. Good video. Sad topic. Never forget.
Finally a common sense explanation, thank you
Common Cents? Did you sea any water purged from ruptured holding tanks when the demolition went "down"?
@@Psychiatrick from million tons of dust, of course not ?
Awsome video bro keep up the good work.
Uhhhhh you forgot all the explosives that took down buildings 1, 2 , 6 and 7😊
No he didn't. All of the explosives that were used - every one of them - is right there in the model.
What about 3 ,4 ,5and the church 🙄🤔
Why think 6 was taken down by explosives? Even if 1 and 2 were taken down by explosives (which they never were), 2 buildings, 1300 feet tall coming down ontop of 6 would've easily pulverized it.
@@Frontier327 Because 6 has a big hole in the middle.
Of course, they never bothered to check and don't realize it always did.
Can you do a video on how building 7 came down too.