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2014年5月15日，美国路易斯安那州，来自巴克斯代尔空军基地第307轰炸机联队的 B-52H 战略轰炸机接近第931空中加油大队的 KC-135 空中加油机准备进行空中加油。（A B-52 Stratofortress assigned to the 307th Bomb Wing, Barksdale Air Force Base, La., approaches the refueling boom of a KC-135 Stratotanker from the 931st Air Refueling Group, McConnell Air Force Base, Kan., during an air refueling training exercise, May 15, 2014. The two Air Force Reserve aircrews rendezvoused in the sky over Texas to practice air refueling technique and to maintain proficiency. The B-52 and KC-135 are two of the oldest airframes in the Air Force fleet.）

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