FOD two
Col. Les Bradfield, 919th Special Operations Wing commander, participates with maintainers to scour the Duke Field, Fla., tarmac for debris. Maintainers routinely perform "FOD walks" -- FOD is an acronym for foreign object damage -- to prevent foreign objects from potentially damaging aircraft and hampering the flying mission. (U.S. Air Force photo/Tech. Sgt. Jonathan McCallum)