U.S. Air Force Staff Sgt. Emmerson Galupo, 633rd Medical Operations Squadron emergency medical technician, builds a temporary protection tent during an operational readiness exercise at Raptor Town at Langley Air Force Base, Va., Feb. 13, 2012. The three-day exercise prepared Airmen for future inspections and exercises in the coming months. (U.S. Air Force photo by Airman 1st Class Racheal Watson/Released)