EAST CHINA SEA (Oct. 1, 2020) Gunner's Mate 1st Class Joseph Norris, center, from Stone Mountain, Ga., instructs Boatswain's Mate 3rd Class Zachary Kai, left, from Kau, Hawaii, on 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)