U.S. Air Force Maj. Carrie Wentzel, 633rd Force Support Squadron operations officer, finishes lap 16 of a five-mile run on the outdoor track at Langley Air Force Base, Va., Nov. 26, 2013. Throughout her Air Force career, Wentzell has competed in distance races across the world. (U.S. Air Force photo by Staff Sgt. Jarad A. Denton/Released)