WORKING DOG WATCH Two U.S. Marines and a military working dog keep a look out during a mission in Helmand province, Afghanistan, July 20, 2011. The Marines are assigned to the Military Working Dog Platoon, Military Police Support Company, 2nd Marine Expeditionary Force Headquarters Group. SHARE IMAGE: Download Image: Full Size (0.04 MB) Photo By: VIRIN: 221837-H-ZCL19-892.jpg Photo Gallery