Real-Life Thriller Explores al-Qaida Triple Agent's CIA Infiltration, Bombing

Read the transcript: http://to.pbs.org/mQ9n4s In the real-life thriller, "The Triple Agent: The al-Qaeda Mole Who Infiltrated the CIA," author Joby Warrick examines the unlikely story of an operative who infiltrated the CIA and detonated a suicide bomb at a U.S. base in Afghanistan. Margaret Warner discusses the spy story with Warrick.