Senior Airman Scott Phillips, 6th Communications Squadron airfield systems technician, tightens radio frequency cable connections to the localizer at MacDill Air Force Base, Fla., Nov. 15, 2013. The localizer, one of many pieces of equipment that airfield systems Airmen maintain, is a critical air traffic control and landing system. (U.S. Air Force photo/Airman 1st Class Ned T. Johnston)