A KC-135 Stratotanker with the 314th Air Refueling Squadron, Beale Air Force Base, California, soars above the Sierra Nevada Mountains, December 22, 2016. KC-135s have played a vital role in the United States Air Forces aerial refueling capabilities since the 1950s. (U.S. Air Force photo/ Staff Sgt. Bobby Cummings)
U.S.A.F.
2016-12-22
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