Airman 1st Class Steven Singleton, 28th Operation Support Squadron airfield management specialist, notifies the air traffic control tower while leaving the active runway on Ellsworth Air Force Base, S.D., April 4, 2013. Airfield Management Airmen are responsible for maintaining and managing all airfield movement and air traffic procedures. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)