LANGLEY AIR FORCE BASE, Va. -- Tech. Sgt. James Carmen, 633d Security Forces Squadron military working dog trainer, leads Uudensi, 633 SFS bomb and patrol military working dog, through an obstacle course during Military Working Dog training Feb. 26, which is divided into patrol and explosive training sessions. Patrol training consists of attack work, building searches, gunfire, obedience, and filed or area searches; explosive training consists of barracks, warehouse, theater, vehicle, luggage, aircraft, and open area or field searches. (U.S. Air Force photo/Senior Airman Zachary Wolf)