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红旗 15-4 联合空战演习期间，美国空军第457战斗机中队（457FS）的 F-16C 战斗机从内利斯空军基地起飞执演。（An F-16 Fighting Falcon assigned to the 457th Fighter Squadron, Naval Air Station Fort Worth Joint Reserve Base, Texas, takes off during Red Flag 15-4 at Nellis Air Force Base, Nev., Aug. 25, 2015. All four U.S. military services, their Guard and Reserve components and the air forces of other countries participate in each Red Flag exercise.）

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