Secretary of Defense Chuck Hagel, right, and Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin Dempsey hold a press conference Aug. 21, 2014, at the Pentagon in Arlington, Va. The press conference was about U.S. operations in Iraq. President Barack Obama authorized humanitarian aid deliveries to Iraq as well as targeted airstrikes to protect U.S. personnel from extremists known as the Islamic State in Iraq and the Levant. U.S. Central Command directed the operations. (DoD photo by Mass Communication Specialist 2nd Class Sean Hurt, U.S. Navy/Released)