LANGLEY AIR FORCE BASE, Va. – Airmen from the 1st Component Maintenance Squadron walk along the flight line to look for debris such as rocks, bolts, screws and fasteners during a foreign object damage or FOD walk Nov. 10. FOD is any damage to an aircraft, engine, aircraft system, component, or aircraft ground equipment caused by a foreign object. (U.S. Air Force photo/Tech. Sgt. April Wickes)