U.S. Air Force Staff Sgt. Chris Fall, a Military Working Dog handler, relaxes with his dog, Glenn, a Patrol Explosive Detection dog, before an early-morning training exercise at Kandahar Airfield, Afghanistan, July 9, 2012. The handlers and their dogs rotate through Kandahar Airfield for validation prior to moving out to forward operating bases around the country where they will lead combat foot patrols and sniff out IEDs and other explosives.