FOD, the elusive enemy of aircraft
U.S. Air Force Col. Matthew Dana, 35th Fighter Wing vice commander (right), Staff Sgt. April Quintanilla (center) and Tech. Sgt. Beatrice Brown (left), 35th Fighter Wing public affairs photojournalists, pick up foreign debris during the annual Foreign Object Damage walk at Misawa Air Base, Japan, May 6, 2013. Other defenses against FOD are metal detectors, vacuum machines and a sweeper machine constructed from multiple rows of brushes and scoops, known as the FOD Boss. (U.S. Air Force photo by Airman 1st Class Kaleb Snay)