Equipment Operator 3rd Class Joseph Cooper, assigned to Naval Mobile Construction Battalion (NMCB) 11, refuels a generator on a Marine radar site during Exercise Valiant Shield 2016 in Tinian, Commonwealth of the Northern Marianas Islands (CNMI), Sept. 12, 2016. Valiant Shield is a biennial, U.S. Air Force, Navy and Marine Corps exercise held in Guam, focusing on real-world proficiency in sustaining joint forces at sea, in the air, on land and in cyberspace. (U.S. Navy Combat Camera photo by Mass Communication Specialist 1st Class Benjamin A. Lewis/Released)