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A U.S. Air Force B-1B Lancer aircraft assigned to the 9th Expeditionary Bomb Squadron, deployed from Dyess Air Force Base, Texas, prepares to take off from Andersen Air Force Base, Guam, to fly a bilateral mission with X Japan Air Self-Defense Force F-X’s over the East China Sea, July 6, 2017. The purpose of bilateral training is to foster increased interoperability between Japan and U.S. aircraft. Participating in bilateral training enables the operational units to improve their combined capabilities and tactical skills, while also building bilateral confidence and strong working relationships.