A four-ship formation of 20th Fighter Wing(FW) F-16CM Fighting Falcons fly off the coast of South Carolina, July 21, 2017, commemorating the 100th anniversary of the 55th Fighter Squadron’s (FS) activation. The 55th FS has been assigned to the 20th FW 20th Operations Group at Shaw Air Force Base, S.C., since 1994. (U.S. Air Force photo by Tech. Sgt. Gregory Brook)