Senior Airman Jordan Cotton, a maintainer assigned to the 20th Aircraft Maintanence Squadron, Shaw Air Force Base, S.C., work on an F-16 Fighting Falcon during Red Flag 15-4 at Nellis AFB, Nev., Aug. 19, 2015. Red Flag gives aircrew and air support operations service members from various airframes, military services and allied countries an opportunity to integrate and practice combat operations. (U.S. Air Force photo by Airman 1st Class Rachel Loftis)