U.S. marshals based in northern Florida participate in close-quarters battle training at Hurlburt Field, Fla., with U.S. Service members assigned to the Air Force 1st Special Operations Support Squadron who are role-playing as opposing forces May 7, 2014, during Emerald Warrior 14. Emerald Warrior is a U.S. Special Operations Command-sponsored two-week joint/combined tactical exercise designed to provide realistic military training in an urban setting. (U.S. Air Force photo by Senior Airman Justyn M. Freeman/Released)