Defense Secretary Ash Carter; Marine Corps Gen. Joe Dunford, left, chairman of the Joint Chiefs of Staff; Army Gen. Joseph L. Votel, second from right, commander of U.S. Central Command; and Army Gen. Raymond A. "Tony" Thomas, commander of U.S. Special Operations Command, conduct a news conference at MacDill Air Force Base, Fla., March 30, 2016, after change-of-command ceremonies for the two commands. DoD photo by Army Sgt. 1st Class Clydell Kinchen