okay. [ male announcer ] introducing xfinity my account. available on any device. . the pentagon has confirmed the leader of an al qaeda linked group has been killed in a drone strike in somalia. the alleged mastermind between al shabaab's deadly attack in a mall in kenya in 2013. officials say a drone struck a vehicle driven by him on march 12th. joining us from washington washington editor harper's magazine andrew coburn out with a new book "kill chain, the rise of the high-tech assassins." here onset contributor to foreign policy magazine and author of "isis, inside the army of terror," michaelwise. >> "new york times" best-seller.