The extraordinary joy of Ethel Kennedy

In her new book, "Ethel Kennedy: The Extraordinary Life and Bold Legacy," daughter Kerry Kennedy writes about a woman who maintained positivity and resilience despite public and private tragedies. Kennedy talks with correspondent Rita Braver about her mother's marriage to Senator Robert F. Kennedy, and how she forged ahead following his assassination. She also discusses the dichotomy of Ethel's relationship with her son, Robert F. Kennedy Jr.