LOS ANGELES AIR FORCE BASE, Calif. -- Capt. William Uhl holds a half-frog asana, or pose, during the cool-down phase of his hour-long yoga class in the fitness center here. He has been practicing yoga for four years and is certified to teach yoga, Pilates and Power Stretch, which combines yoga and Pilates. The captain is an analyst for the Space and Missile Systems Center's intelligence directorate. (U.S. Air Force photo by Jason M. Webb)