Staff Sgt. Roger Toliver, 644th Combat Communications Squadron radio frequency transmissions supervisor, performs a preventative-maintenance inspection on an antenna to ensure reliable radio communications are maintained. The 644th CBCS is in place at Suwon Air Base from Anderson Air Force Base, Guam, to help set up and maintain temporary communications to support and enable approximately 1,500 sorties during the displacement of Osan Air Base’s assets and personnel. (U.S. Air Force photo/Tech. Sgt. Travis Edwards-Released)