U.S. Air Force Senior Master Sgt. Ryan Alston, left, 439th Supply Chain Operations Squadron superintendent, hands off a 45 pound weight to Ephraim Colburn, middle, 439th SCOS combat support and sustainment technician, and Staff Sgt. LeighAnne Massa, right, 439th SCOS mission capable journeymen, during the moving bridge part of the obstacle course, May 24, 2012, at the Squadron Fitness Challenge held at the Langley Air Force Base, Va., running track. During the event teams competed in several physical challenges for the best time in each event. (U.S. Air Force photo by Senior Airman Wesley Farnsworth/Released)