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Se Jong Daewang class destroyer ROKS Yulgok Yi I (DDG 992) (right) of the Republic of Korea Navy and Atago class destroyer JS Maya (DDG 179) (left) of the Japanese Maritime Self-Defense Force sail alongside Arleigh Burke-class guided-missile destroyer USS John Finn (DDG 113) (center) while conducting a trilateral ballistic missile defense exercise, July 16. John Finn is assigned to Commander, Task Force 71/Destroyer Squadron (DESRON) 15, the Navy’s largest forward-deployed DESRON and U.S. 7th Fleet’s principal surface force.