Runner (Public Domain)

Capt. Jamie Turner runs in preparation for the Ironman World Championship at Joint Base Charleston, S.C., Sept. 21, 2010. Captain Turner is training to swim 2.4-miles through ocean waves, bike 112 miles and run a 26.2-mile marathon through challenging lava-covered terrain. She is a pilot with the 315th Airlift Wing. (U.S. Air Force photo/James M. Bowman)