Master Sgt. Duane Smith, 15th Intelligence Squadron first sergeant, times Tech. Sgt. Therasa Carlson, Air Combat Control command and control policy and procedures, and Daniel Williams, ACC emergency mass notification system technician, during the Push-up-A-Thon/Sit-up-A-Thon at Langley Air Force Base, Va., March 11, 2011. The fitness event was sponsored by the Langley first sergeants in order to be donated to the Enlisted Heritage Hall museum. (U.S. Air Force photo by Airman 1st Class Kayla Newman/Released)