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USS John Paul Jones (DDG 53), USS Shoup (DDG 86), JS Chokai (DDG 176), ROKS Sejung The Great (DDG 991) and ROKS Gang Gam Chan (DDH 979) steam in formation during Exercise Pacific Dragon 2016. Pacific Dragon is a trilateral Ballistic Missile Defense tracking event between the U.S. Navy, Japan Maritime Self Defense Force and Republic of Korea Navy. The biennial exercise focuses on improving tactical and technical coordination among its participants, including the detection, tracing and reporting of ballistic targets.