Master Sgt. Litton Retires
U.S. Air Force Master Sgt. Christopher Litton, 20th Aircraft Maintenance Squadron assistant section chief, receives his certificate of retirement from Maj. Michael Fields, 20th AMXS commander, Shaw Air Force Base, S.C., June 28, 2013. A certificate of retirement is received in most cases after serving 20 or more years in the military. (U.S. Air Force photo by Airman 1st Class Ashley L. Gardner/Released)