U.S. Air Force Maj. Derek St. John, 56th Air Refueling Squadron assistant director of operations, goes over the engine specifications of the KC-46 Pegasus at Altus Air Force Base, Oklahoma, on Aug. 31, 2021. Each Class will have roughly 20 students from installations across the Air Force. (U.S. Air Force photo by Staff Sgt. Cody Dowell)
28.0-300.0 mm f/3.5-5.6
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