Air Force Reservists with the 940th Air Refueling Wing run 1.5 miles as part of their official fitness test March 4, 2007 at Beale Air Force Base, Calif. The Air Force physical fitness assessment measures aerobic fitness, physical strength/endurance and body composition and helps ensure Airmen are "Fit to Fight." (U.S. Air Force photo/Stacey Knott)

Air Force Reservist Lt. Col. Tim McCoy, 940th Mission Support Group deputy commander, does crunches while Chief Master Sgt. Anthony Armstrong, 940th Air Refueling Wing command chief, provides support during official fitness testing March 4, 2007 at Beale Air Force Base, Calif. The Air Force physical fitness assessment measures aerobic fitness, physical strength/endurance and body composition and helps ensure Airmen are "Fit to Fight." (U.S. Air Force photo/Stacey Knott)