U.S. Army Lt. Col. Stephen Dawson, left, leads his team through a tire drag during the Tough Mudder Centurion Challenge on Camp Buehring, Kuwait, April 21, 2012. Dawson commands the 1st Cavalry Division's 1st Brigade Special Troops Battalion, 1st Brigade Combat Team. U.S. Army Lt. Col. Stephen Dawson, left, leads his team through a tire drag during the Tough Mudder Centurion Challenge on Camp Buehring, Kuwait, April 21, 2012. Dawson commands the 1st Cavalry Division's 1st Brigade Special Troops Battalion, 1st Brigade Combat Team. SHARE: Download: Full Size (1.79 MB) Tags: Photo Essays Credit: VIRIN: 915954-T-AVD64-651.jpg Photo Gallery