U.S. Army Sgt. Jeremy Bergstrom, 2nd Battalion, 43rd Air Defense Artillery Regiment, lies in a cool pool of mud after completing a Diversity Day mud run September 20, 2015 at Al Udeid Air Base, Qatar. The mud run challenged 106 runners with several obstacles from low crawling, T-wall climbing, barrier hurdles, and a Ôdeep freezeÕ cold mud pool. The event was held to help spread the word of Diversity Day, an initiative started by the Department of Defense for diversity events held throughout the year. (U.S. Air Force photo/ Staff Sgt. Alexandre Montes)