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An F-35A Lightning II gets ready to land Sept. 13, 2013, at Hill Air Force Base, Utah. This was the first F-35 to land at Hill AFB. The multirole, fifth-generation fighter arrived from the 422nd Test and Evaluation Squadron, at Nellis AFB, Nev. to undergo post-production modifications at the Ogden Air Logistics Complex. (U.S. Air Force photo/Alex R. Lloyd)