From left, Secretary of Defense Chuck Hagel and Chairman of the Joint Chiefs of Staff U.S. Army Gen. Martin E. Dempsey testify before the Senate Armed Services Committee Sept. 16, 2014, in Washington. The testimony was about the U.S. response to the Islamic State in Iraq and the Levant, Ebola and events in Ukraine. (DOD photo by Mass Communication Specialist 1st Class Daniel Hinton, U.S. Navy/Released)