191028-N-WI365-1051 YOKOSUKA, Japan (Oct. 28, 2019) The Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56) departs Fleet Activities Yokosuka to commence at-sea testing. 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/Released)