Staff Sgt. Robert Banker, 28th Communications Squadron ground radar maintenance technician, uses special computer software to inspect an air conditioning system at the radar tower in Box Elder, S.D., Aug. 27, 2013. The air conditioning systems are responsible for keeping the $3.5 million Digital Airport Surveillance Radar systems from overheating. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)