SEA OF JAPAN (Nov. 25, 2020) Hospital Corpsman 3rd Class Dejah Clark, from Houston, draws up a flu vaccine dose in main medical aboard the Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56). John S. McCain is assigned to 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 2nd Class Markus Castaneda)