Standing by
Staff Sgt. Matthew Childers, 332nd Expeditionary Civil Engineer Squadron explosive ordnance disposal flight, waits behind a barrier for a safe call prior to advancing to a bomb site during a mass casualty exercise at an undisclosed location in Southwest Asia, Jan. 30, 2012. EOD, fire department, medical and security forces personnel participated in the exercise. Childers is deployed from Dyess Air Force Base, Texas, and is a native of San Antonio, Texas. (U.S. Air Force photo by Staff Sgt. Joshua J. Garcia/Released)