Military working dogs have been involved in miltary operations dating back to the early 1940's and they still play a vital role in Operation Iraqi Freedom. Dog handlers U.S. Marine Corps Lance Cpl. Joseph A. Tullier and Cpl. Matthew A. Cobb both with the 2nd Military Police Battalion, II Marine Expeditioary Force, work with the dogs daily. U.S. Marine Corps photo by Cpl. Christi Prickett