John Musser, Fort Eustis Felker Army Airfield manager, performs push-ups while Master Sgt. Steven Dawson, 633d Force Support Squadron first sergeant, keeps track of the 10-minute time limit during the Push-up-A-Thon/Sit-up-A-Thon at Langley Air Force Base, Va., March 11, 2011. Langley first sergeants sponsored the event at the base fitness center in support of the Enlisted Heritage Hall museum. (U.S. Air Force photo by Airman 1st Class Racheal Watson)