How tracks changed forever after the first Tokyo Olympics

The Tokyo Olympics in 2021 will be historic. The 1964 Tokyo Olympics already was, thanks to a big change in the track itself.
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This video is all about the transition from cinder tracks to synthetic tracks in the Olympics, and why that matters. Here's a grab bag of links:
Thumb by the incomparable Linus Boman. Have you seen his channel? / @linusboman
Track maker extraordinaire: beynonsports.c...
Tracks being laid down: • Carpell Surfaces | Sto...
Let's Run forum post about cinder tracks: www.letsrun.co...
Big OpEd about how synthetic tracks are a must have for training: www.infobae.co...
A bit about the certification process: www.worldathle...
Gaze upon Hayward: hayward.uorego...