Remembering Johnny Carson, Pt. 1 & Pt. 2; Jared Diamond

Doc Severinsen, former bandleader of "The Tonight Show," and Tom Shales of the Washington Post share memories of Johnny Carson, the "King of Late Night"; continuing with a look back at conversations about Carson over the years, with "Tonight Show" host Conan O'Brien, "Late Show" host David Letterman, Calvin Trillin, and Bette Midler. A conversation with Jared Diamond, winner of the Pulitzer Prize for "Guns, Germs, and Steel," introducing his companion book "Collapse: How Societies Choose to Fail or Succeed."