Keeping our aircraft safe Published May 10, 2011 By Staff Sgt. Jamie L. Perry 911 AW/PA PITTSBURGH IAP ARS -- Members of the 911th Airlift Wing participated in a "FOD walk" on May 10, 2011. FOD, which stands for Foreign Object Debris, can come in many shapes and sizes to include pebbles, bolts, pieces of sheet metal, plastic, and anything that could potentially harm an aircraft. "FOD walks" are an essential part of keeping our flight line free of debris and our aircraft free from Foreign Object Damage. (U.S. Air Force photo/Staff Sgt. Jamie L. Perry)