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U.S. Air Force Col. Peter Fesler, 1st Fighter Wing commander, arrives to Nellis Air Force Base, Nev., Feb. 18, 2017, to participate in Red Flag 17-1. Red Flag is the U.S. Air Force's premier joint and allied force air-to-air combat training exercise. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)

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