U.S. Air Force Staff Sgt. Bobbie Ohm, a military working dog handler with the 99th Security Forces Squadron, walks with Nero, a military working dog, to search for explosives during a joint explosive detection training exercise at Nellis Air Force Base, Nev., Dec. 16, 2010.
(DoD photo by Senior Airman Brett Clashman, U.S. Air Force/Released). Original public domain image from Flickr