On this week's "60 Minutes," Anderson Cooper reports on the nerve-wracking Mars landing of the rover Perseverance, the painstaking process of launching the tiny helicopter Ingenuity, and the extraordinary images the two have already sent back to Earth. In his new book, Michael Lewis profiles people who tried to sound the alarm about COVID-19 as officials failed to act. John Dickerson tells us more. And Lesley Stahl profiles Darren Walker, a gay, African American man, and Founder of one of this country's largest and most storied philanthropies, the Ford Foundation.