A 20th Fighter Wing (FW) F-16CM Fighting Falcon is prepared for take off at Shaw Air Force Base (AFB,) S.C., July 21, 2017. Flagship aircraft from the 20th FW, the 55th, 77th and 79th Fighter Squadrons (FS) flew a four-ship formation flight in commemoration of the 55th FS’s 100th anniverary,which was celebrated Aug. 9, 2017. (U.S. Air Force photo by Tech. Sgt. Gregory Brook)