Lt. Col. Christopher Johnson, commander, 1-8 Combined Arms Battalion, 3rd Brigade Combat Team, 4th Infantry Division, completes the 100-meter swim as part of the Striker Iron Soldier competition. Johnson finished in second place for the male competitors in a time of 1 hour, 12 minutes and 57 seconds. (U.S. Army photo by Sgt. Zach Mott, 3rd Brigade Combat Team Public Affairs Office, July 5, 2007)