Airman 1st Class Steven Singleton, 28th Operation Support Squadron airfield management specialist, visually scans the active runway for foreign object and debris during a FOD check on Ellsworth Air Force Base, S.D., April 4, 2013. Airfield Management Airmen are required to complete a FOD check every two hours to guarantee the airfield is free from any obstructions and eliminate potential FOD hazards. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer/Released)