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U.S. Air Force Capt. John Peskar, 18th Aggressor Squadron pilot, prepares to refuel an F-16 Fighting Falcon from a KC-135 Stratotanker assigned to the 22nd Air Refueling Wing McConnell Air Force Base, Kansas, May 3, 2016, during RED FLAG-Alaska (RF-A) 16-1 at Eielson Air Force Base, Alaska. RF-A is a Pacific Air Forces command directed field training exercise for U.S. and allied forces, to provide joint offensive counter-air, interdiction, close air support and large force employment training in a simulated combat environment. (U.S. Air Force photo by Staff Sgt. Shawn Nickel/Released)