U.S. Air Force Senior Airman Nathan Evans, 20th Component Maintenance Squadron aerospace propulsion technician, applies safety wiring to an F-16 Viper engine at Shaw Air Force Base (AFB), S.C., March 27, 2019. The flight provides engines for Shaw’s 55th, 77th and 79th Aircraft Maintenance Units as well as for Eglin AFB, Fla. (U.S. Air Force photo by Senior Airman Christopher Maldonado)