Maintainers assigned to the 20th Aircraft Maintanence Squadron, Shaw Air Force Base, S.C., drain hydraulic fluid from an F-16 Fighting Falcon during Red Flag 15-4 at Nellis AFB, Nev., Aug. 19, 2015. The maintainers drained the hydraulic fluid so they could replace a landing gear tire on the aircraft. (U.S. Air Force photo by Airman 1st Class Rachel Loftis)