Treating COVID-19 Today | The Lincoln Project | Grizzlies

Treating COVID-19 Today – Scott Pelley reports on the latest therapies being developed to treat the COVID virus. The Lincoln Project – A group of longtime Republican strategists have turned against the party and formed a Super PAC aimed at unseating President Trump. Lesley Stahl reports. Grizzlies – Thanks to conservation efforts, the giant predators are returning to Montana in numbers not seen in 150 years. But human populations are also growing near the areas where the grizzlies are recovering in the greatest numbers. Bill Whitaker reports from the Montana wilderness.