Adolescent psychologist Dr. Laurence Steinberg explains why the often rocky teenage years wind up shaping who we will be for the rest of our lives. Todd Brewster looks at some of the most tumultuous months of Abraham Lincoln’s presidency. Anne Sinclair tells the story of her grandfather, one of the most famous European art dealers who fled Vichy France for America. Tony- and Emmy-awarding winning comic actress Andrea Martin shares some memories of her life in show business. This show was originally broadcast September 25, 2014, and we're re-airing it on this Thanksgiving weekend.