Maj. Roy Thrailkill (right) challenges an insurgent Dec. 20 during a training exercise for the Common Battlefield Airman Training Bridge course held at Camp Bullis, Texas. CBAT-B course instructor Tech. Sgt. Christopher Dunstone acts as an interpreter, while instructor Staff Sgt. Joe Pearcy acts as the insurgent. CBAT-B course cadre consist of Airmen of all specialties, including security forces, transportation, explosive ordnance disposal, survival, combat weather, tactical air control, combat control and pararescue. Major Thrailkill is a member of the Air Education and Training Command at Randolph Air Force Base, Texas. (U.S. Air Force photo/Staff Sgt. Beth Del Vecchio)