Jane Pauley sits down with Oprah Winfrey in a two-part segment to talk about her weight-loss journey and much more.Jim Axelrod talks with acting and playwriting heavy-hitters Tracy Letts and Carrie Coon: husband and wife who are now collaborating on Broadway.Erin Moriarty investigates the challenges of navigating the health insurance system, including what happens when sick people are refused care.Conor Knighton meets the Highpointers Club.