The diamond

U.S. Air Force Staff Sgt. Camille Espinoza 823rd Base Defense Squadron fireteam leader, performs diamond pushups during Sergeant Rock physical training (PT) at Moody Air Force Base Ga., Sept. 6, 2011. Sergeant Rock PT was put in place to help individuals improve their physical strength and mental toughness. (U.S. Air Force photo by Airman 1st Class Joshua Green/Released)

PHOTO BY: Unknown
VIRIN: 110907-F-DR541-940.JPG
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