The Air Force celebrates the 60th birthday of the KC-135 Stratotanker Aug. 31, 2016. The first aircraft flew in August of 1956 and was later delivered to the Air Force in June 1957. The first KC-135 was delivered to the 93rd Air Refueling Squadron, which was assigned to Castle Air Force Base, California at the time, but is now located at Fairchild Air Force Base. (Courtesy Photo)

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