Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin E. Dempsey, right, listens as Secretary of Defense Chuck Hagel testifies before the Senate Armed Services Committee Sept. 16, 2014, at the Hart Senate Office Building in Washington, D.C. During their testimony, Hagel and Dempsey discussed U.S. policy toward Iraq and Syria and the threat posed by extremists known as the Islamic State in Iraq and the Levant. (DoD photo by Mass Communication Specialist 1st Class Daniel Hinton, U.S. Navy/Released)