Mark Updegrove, director of the Lyndon Baines Johnson Library and Museum, discusses his book, "Indomitable Will: LBJ in the Presidency," which provides a portrait of LBJ through the stories and recollections of those who were with him everyday during his presidency. Named "one of the country’s best historians" by CNN, Updegrove spent much of his career as a media executive and producer with TIME magazine, Newsweek, Nickelodeon magazine and MTV magazine for MTV Networks.