WORKING DOG TRAINING U.S. Marine Cpl. William Perkins, left, wrestles with Akim, a military working dog, during controlled aggression training in the U.S. Central Command area of operations, Dec. 28, 2014. Perkins is assigned to Special Purpose Marine Air Ground Task Force-Crisis Response-Central Command, Command Element. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 297563-Z-DYF67-731.jpg Photo Gallery