Doris Kearns Goodwin on What Today's Leaders Can Learn From Past `Turbulent Times'

In her new book, “Leadership in Turbulent Times,” presidential historian Doris Kearns Goodwin explores the trajectories of Abraham Lincoln, Theodore Roosevelt, Franklin D. Roosevelt and Lyndon B. Johnson, arguing that for all four of them, “at some point, ambition for the self became ambition for something larger.” Judy Woodruff interviews the author about her inspiration and hope for her work.