U.S. Air Force Airmen of the 307th Security Forces Squadron participate in a Patriot Defender exercise at Ft. Wolters, Texas, June 18, 2013. Patriot Defender is a two-week exercise designed to train security forces of the Air Force Reserve Command in real-world tactics used in deployed environments. (U.S. Air Force photo illustration by Tech. Sgt. Ted Daigle/Released)