Sergeant Rex - The Unbreakable Bond Between a Marine and His Military Working Dog by Mike Dowling. Deployed into the cauldron of Iraq in 2004, Sgt. Dowling and his dog, Rex, were part of the first military working-dog team sent to the front lines since Vietnam. Filled with harrowing tales of bomb-detection work, "Sergeant Rex" is both a heart-pounding and heart-warming account of how an unbreakable human-canine bond helped Dowling and Rex to stay focused on their mission and save countless lives. Shelley L. Rhodes, M.A. CVRT and Ludden black Labrador Guide Dog. In a library we are surrounded by many hundreds of dear friends imprisoned by an enchanter in paper and leathern boxes. -Ralph Waldo Emerson, writer and philosopher (1803-1882)