Watch dog
Rex, a 96th Security Forces military working dog, keeps an eye on a "suspect" during a search training demo at Eglin Air Force Base, Fla. Rex and his handler, Staff Sgt. David Aenchbacher, are just one of the K-9 teams at Eglin. Eglin’s military working dog teams are expected to maintain training, perform vehicle searches, patrols, building sweeps, dorm checks and demonstrations. They also help local law enforcement with further K-9 training both at Eglin and outside the gate. (U.S. Air Force photo/Samuel King Jr.)