A U.S. Air Force recruit pushes off the pool wall during the swimming portion of the special operations combine Dec., 6, 2012, at the Shellbank Fitness Center, Langley Air Force Base, Va. The 317th Recruiting Squadron held the combine for recruits to give them a taste of what it takes to become a battlefield Airman. (U.S. Air Force photo by Airman 1st Class R. Alex Durbin/Released)