A dog and his handler
Senior Airman Tariq Russell, a 21st Security Forces Squadron military working dog handler, and his partner, Ppaul, walk the flightline at Peterson Air Force Base, Colo., June 14, 2016. Along with detection, Ppaul can be used for suspect apprehension and search and rescue missions. (U.S. Air Force photo/Airman 1st Class Dennis Hoffman)