Swimmers compete in the qualifying round of the 100-meter freestyle event during the 2012 Paralympic Games at the Aquatics Center in London Aug. 30, 2012. U.S. Navy Lt. Bradley Snyder won the event with a Paralympic record time of 57.18 seconds. The Paralympics is a major international sporting event in which thousands of athletes, including wounded and injured U.S. Service members, participate in a variety of sporting events. (U.S. Army photo by Sgt. 1st Class Tyrone C. Marshall Jr./Released)