An U.S. marshal based in northern Florida participates in close-quarters battle training with fellow marshals May 7, 2014, at Hurlburt Field, Fla., as U.S. service members assigned to the Air Force 1st Special Operations Support Squadron role play as opposing forces during the training, part of 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)