100th CS Airmen help planes land safely
U.S. Air Force Senior Airman Trevin Brecheisen, 100th Communications Squadron Airfield Systems technician from Sacramento, Calif., selects tools to open a Tactical Air Navigation transponder Sept. 3, 2014, on RAF Mildenhall, England. The TACAN gives aircraft pilots distance and direction information to ensure they can navigate to the airfield safely. (U.S. Air Force photo/Gina Randall/Released)