Bob Schieffer's remarkable encounter with Lee Harvey Oswald's mother

      |Bob Schieffer, then a reporter with the Star-Telegram newspaper, was stuck in the newsroom answering phones following President John F. Kennedy's assassination when Lee Harvey Oswald's mother called to ask for a ride to Dallas. The chief Washington correspondent and "Face the Nation" anchor discusses how he became part of the story on Nov. 22, 1963.