U.S. Air Force Airman 1st Class Stefaugn Waters, 633rd Force Support Squadron career development technician, performs a weighted, bear-crawl exercise during the annual Squadron Fitness Challenge at Langley Air Force Base, Va., May 24, 2012. The Squadron Fitness Challenge takes place during May Fitness Month, which promotes living a healthier lifestyle. (U.S. Air Force photo by Airman 1st Class Kayla Newman/Released)