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红旗-阿拉斯加 15-2 联合空战演习中，美国空军第22空中加油联队（堪萨斯州麦康奈尔空军基地，22ARW）一架 KC-135R 空中加油机飞越艾尔森空军基地。（A U.S. Air Force KC-135 Stratotanker assigned to the 22nd Air Refueling Wing, McConnell Air Force Base, Kan., prepares to land May 14, 2015, after a Red Flag-Alaska (RF-A) 15-2 mission at Eielson Air Force Base, Alaska. The support the Stratotanker provides during aerial-refueling is vital to the success of the U.S. and coalition forces participating in RF-A.）