SOUTH CHINA SEA (Jan. 7, 2021) Seaman Leopoldo Cerrillo, from Indio, Calif., simulates securing a valve during a damage control training team drill aboard the Arleigh Burke-class guided-missile destroyer USS John S. McCain (DDG 56). 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)