What comes next after top al Qaeda leader killed by U.S. drone strike

What comes next after top al Qaeda leader killed by U.S. drone strike

What comes next after top al Qaeda leader killed by U.S. drone strike

CBS News senior investigative correspondent Catherine Herridge joined Anne-Marie Green and Vladimir Duthiers with details on the U.S. operation in Afghanistan that led to the death of Ayman al-Zawahiri, the leader of al Qaeda and a key figure behind the Sept. 11 terrorist attacks.