EAST CHINA SEA (Oct. 1, 2020) Gunner's Mate 1st Class Joseph Norris, right, from Stone Mountain, Ga., explains how to properly handle an M240B machine gun during a crew served weapons training on the aft missile deck aboard the Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56). John S. McCain is assigned to Destroyer Squadron Fifteen (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 2nd Class Markus Castaneda)