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In this photo, civil engineer Airmen from U.S. and Republic of Korea assemble in formation before being dispatched to repair a runway for exercise Pacific Unity, June 11, 2015, Jungwon Air Base, Republic of Korea. PACUNITY had the goal of developing U.S. Air Force and ROK engineer interoperability for rapid responses to contingency and disaster response events. (U.S. Air Force photo by Staff Sgt. Jake Barreiro/Released)