PHILIPPINE SEA (March 14, 2021) The Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56) fires its 5-inch gun during a live-fire gunnery exercise. John S. McCain is assigned to Task Force 71/Destroyer Squadron (DESRON) 15, the Navy’s largest forward-deployed DESRON and the U.S. 7th Fleet’s principal surface force. (U.S. Navy photo by Mass Communication Specialist 1st Class Jeremy Graham)