U.S. Air Force Staff Sgt. Justin Aycock from Charlotte, N.C., assigned to the 52nd Security Forces Squadron, searches the engine compartment of a vehicle with his military working dog, Katya, while an Iraqi police officer watches on Contingency Operating Base Adder, Dhi Qar, Iraq, Sept. 24, 2009. Aycock provided demonstrations to the Iraqi police on explosives searching techniques with K-9s.