In 1918, Joe and Rose Kennedy had their first daughter, Rosemary. She experienced developmental difficulties as a child and had trouble keeping up in school. When she was 23, her father arranged for her to undergo a lobotomy, which left her profoundly handicapped for the rest of her life. The truth about Rosemary was kept hidden for decades. We’re joined by historian Kate Clifford Larson, author of the New York Times bestseller ‘Rosemary: The Hidden Kennedy Daughter,’ to discuss Rosemary’s life and legacy.