U.S. Defense Secretary Ash Carter, center, and Indian Defense Minister Manohar Parrikar, left, walk with U.S. Air Force Gen. Herbert J. "Hawk" Carlisle, commander of Air Combat Command, on arrival at Langley Air Force Base, Va., before boarding an MV-22 Osprey to tour the USS Dwight D. Eisenhower in the Atlantic Ocean Dec. 10, 2015. DoD photo by Senior Master Sgt. Adrian Cadiz