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美国内华达州内利斯空军基地，西部绿旗 14-2 联合空地攻击演习中，美国空军南卡罗来纳州空中国民警卫队第169战斗机联队第157战斗机中队（169FW/157FS）一架 F-16CM 战斗机进行飞行前检查。（U.S. Air Force Senior Airman Isaac Niesen, a crew chief with the 169th Aircraft Maintenance Squadron at McEntire Joint National Guard Base, South Carolina Air National Guard, conducts pre-flight checks on an F-16 Fighting Falcon fighter jet as Maj. Ryan Corrigan prepares to taxi and takeoff for a training mission during Green Flag-West at Nellis Air Force Base, Nev. on Nov. 4, 2013. Green Flag-West provides joint close-air support training for forces preparing to support combat operations.）

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