Khizr Khan, the Muslim American Gold Star father who spoke at the 2016 DNC, discusses his new book An American Family: A Memoir of Hope and Sacrifice. Artists Sarah Sze and Julie Mehretu talk about The Artist Project: What Artists See When They Look At Art. Annie Leibovitz is a legendary photographer who began her career in the 1970s, shooting photos for Rolling Stone. Her new book is Annie Leibovitz: Portraits 2005-2016.