Cpl. J.D. Harden, an aviation mechanic assigned to Marine Fighter Attack Squadron 122, out of Marine Corps Air Station Yuma, Arizona, performs pre-flight checks on a F-35B Lightning II fighter jet on the flighline at Nellis Air Force Base, Nev., July 15, 2019. Harden and his squadron are assigned the role of strike for Red Flag 19-3 at Nellis. (U.S. Air Force Photo by Airman 1st Class Dwane R. Young)
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