An F-16 Fighting Falcon maintainer completes a final pre-flight inspection of an F-16 assigned to the 457th Fighter Squadron, Naval Air Station Fort Worth Joint Reserve Base, Texas, during Red Flag 15-4 at Nellis Air Force Base, Nev., Aug. 24, 2015. The air training missions are conducted over the 2.9 million acre Nevada Test and Training Range. (U.S. Air Force photo by Senior Airman Thomas Spangler)