It's a dog's life
Frisco, 4th Security Forces Squadron military working dog, completes his daily physical training with a run through the obstacle course on Seymour Johnson Air Force Base, N.C., Feb. 26, 2010. The obstacle course, which includes stairs, ramps, underground tunnels and hurdles at various heights, helps improve these four-legged warfighters' agility. (U.S. Air Force photo/Senior Airman Rae Perry)