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美国内华达州内利斯空军基地，西部绿旗 14-09 联合空地攻击演习中，美国空军第309战斗机中队（309FS）一架 F-16C 战斗机向跑道滑行。（An F-16 Fighting Falcon from the 309th Fighter Squadron, Luke Air Force Base, Ariz., taxis to the runway during Green Flag-West 14-09 at Nellis AFB, Nev., Aug. 21, 2014. Green Flag exercises give visiting units the opportunity to train in air-to-ground combat operations. Many of the training exercise scenarios call for providing air support to ground troops who are participating in ground combat exercises.）