LANGLEY AIR FORCE BASE, Va. -- Airman 1st Class Aaric Ballard, 1st Operations Support Squadron air traffic controller, issues instructions to simulated aircraft using the air traffic control tower simulator Aug. 11. Trainees use real equipment as they work though a variety of scenarios, using video simulations of airfield and airspace operations, designed to mimic actual tower operations in a safe training environment. (U.S. Air Force photo/Airman 1st Class Jason J. Brown)