New book traces the evolution of terrorism since bin Laden

The evolution of terrorism is the subject of this new book, "The Anatomy of Terror.” More

Ali Soufan, a former FBI counterterrorism agent who identified the 9/11 hijackers, felt both joy and worry the night Osama bin Laden was killed. He worried that the U.S. didn't have a strategy to combat bin Laden's message, which lived on even though the al-Qaida leader was dead. The evolution of terrorism is the subject of his new book, "The Anatomy of Terror.” Soufan joins Margaret Warner.

AIR DATE 8/15/17