Nobel Prize-winning economist and author Joseph Stiglitz discusses on the emergence of Donald Trump and how the Democrats can repair their party. David Kaufman gives an intimate portrait of Mary Martin, the actress, singer and dancer who defined classic Broadway roles. Animator Travis Knight talks about his critically acclaimed film "Kubo and the Two Strings," which he wrote and directed. Tom Robbins, a reporter for The Marshall Project, investigated reports at the Mid-State Correctional Facility where prisoners were reportedly beaten by guards.