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A U.S. Air Force F-16 Fighting Falcon aircraft refuels behind a KC-135 Statotanker deployed from Fairchild Air Force Base, Wash., Oct. 12, 2016 during RED FLAG-Alaska (RF-A) 17-1 at Eielson Air Force Base, Alaska. RF-A simulates the first 10 combat sorties of an initial surge during a conflict, enabling pilots to better understand the stresses of the environment. (U.S. Air Force photo by Staff Sgt. Shawn Nickel)