U.S. Army Staff Sgt. Clayton Glover, assigned to the 529th Military Police Company, and his military working dog, Alf ,search for explosives at an Iraqi checkpoint outside Samarra, Iraq, Feb. 27, 2007. U.S. Army Staff Sgt. Clayton Glover, assigned to the 529th Military Police Company, and his military working dog, Alf ,search for explosives at an Iraqi checkpoint outside Samarra, Iraq, Feb. 27, 2007. SHARE: Download: Full Size (3.43 MB) Tags: Photo Essays Credit: VIRIN: 721275-N-ZHO87-227.jpg Photo Gallery