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U.S. Air Force F-16 Fighting Falcons with the 13th Fighter Squadron sit on a runway during Exercise Red Flag-Alaska 19-1, at Eielson Air Force Base, Alaska, Oct. 6, 2018. RF-A 19-1, held Oct. 4 to 19, exposes all parties to combat-like scenarios to familiarize members with high-intensity, fast-paced operations to improve interoperability among allies.