Push-up power
U.S Air Force Staff Sgt. David Mancha, 23d Force Support Squadron, participates in the Top 3 push-up challenge at Moody Air Force Base, Ga., March 23, 2012. The 23d FSS team was made up five members, and each team was required to have at least one female per team. (U.S. Air Force photo by Airman 1st Class Paul Francis/Released)