Defense Secretary Ash Carter walks with Marine Corps Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, as they return to the Pentagon after a visit to U.S. Cyber Command headquarters on Fort George G. Meade, Md, Jan. 27, 2016. The defense leaders met with Cybercom commander, Adm. Michael S. Rogers. DoD photo by Air Force Senior Master Sgt. Adrian Cadiz