U.S. Air Force Master Sgt. Jaclyn MacKinley, 380th Air Expeditionary Wing superintendent of wing staff executive services, takes aim at targets of opportunity during an active-shooter exercise at the wing headquarters building July 31, 2012. MacKinley, an Athens, Tenn., native, is deployed to the 380th AEW from Vandenberg Air Force Base, Calif. (U.S. Air Force photo/Master Sgt. Scott MacKay)