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An F-35A Lightning II fighter jet pilot assigned to the 421st Fighter Squadron at Hill Air Force Base, Utah, puts on his helmet during Red Flag 20-1 at Nellis AFB, Nevada, Feb. 13, 2020. Red Flag exercises challenge Airmen, sister services and coalition forces in a multi-domain training exercise. (U.S. Air Force photo by Airman 1st Class Bryan Guthrie)
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