EXERCISE AIM A U.S. Air Force airman keeps an eye out for role players portraying enemy fighters after he and his team members participated in a mock ambush during a route-clearance mission for an exercise in Thetford, England, Sept. 4, 2012. The airman is assigned to the 100th Security Forces Squadron, based at Royal Air Force Mildenhall, England. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 796245-A-MLS84-283.jpg Photo Gallery