Staff Sgt. Mark Sidle, 455th Expeditionary Security Forces Group dog handler, and his dog, Arco, stand guard at an entry control point at Bagram Airfield, Afghanistan, Dec. 1, 2012. The 455 ESFG military working dog handlers work side by side with their dogs, searching vehicles for illegal drugs and explosives. (U.S. Air Force photo/Senior Airman Chris Willis)