U.S. Air Force Tech. Sgt. Thomas Dawson, 509th Civil Engineer Squadron, performs a shoulder-strengthening exercise with assistance from U.S. Air Force Senior Airman India Meserve, 509th Medical Operations Squadron physical therapy technician at Whiteman Air Force Base, Mo., Nov. 8, 2013. According to Meserve, physical therapy restores muscular function and helps prevent future disabilities. (U.S. Air Force photo by Staff Sgt. Nick Wilson/Released)