Idaho ranchers torn between hunting and deterrents for gray wolves harming their livestock

The grey wolf was once nearly hunted to extinction in the U.S. until the federal government put it on the endangered species list in 1974. 20 years later, it was successfully reintroduced to Idaho and Yellowstone. As pack numbers grew, the gray wolf was taken off the list. But more than 50 wildlife groups are worried it may face endangerment again from expanded hunting. William Brangham reports.
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