Airmen perform pull-ups during the Mash Fitness competition in the Pride Hangar at Ellsworth Air Force Base, S.D., Aug. 23, 2013. Each team was required to designate a team member with the responsibility of timing each event. In the end, judges collected completion times from each team and determined the winner of the event. (U.S. Air Force photo by Airman 1st Class Hrair H. Palyan/Released)