Maj. Bryan Kemper, 28th Medical Operations Squadron chief of optometry, downs a mystery drink comprised of cottage cheese, mustard and pickle as part of a challenge during the Amazing Race competition at Ellsworth Air Force Base, S.D., April 13, 2012. During the competition, participants had to run a three-mile course across Ellsworth to find and complete seven challenge stations with prizes given to the top three teams. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)