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A Japanese MCH-101 airborne mine countermeasures helicopter carrying Vice Adm. Hiroshi Yamamura, commander, Fleet Escort Force, and Rear Adm. Tatsuya Fukuda, commander, Escort Flotilla 4, lands on the flight deck of the Navy’s only forward-deployed aircraft carrier, USS Ronald Reagan (CVN 76) for the start of Exercise Keen Sword 2017 (KS17). Ronald Reagan is participating in Exercise KS17, a joint, bilateral field-training exercise involving U.S. military and Japan Self-Defense Force personnel designed to increase the combat readiness and interoperability of the Japan-U.S. alliance.