Airmen test their strength during Combat Endurance Challenge
YOKOTA AIR BASE, Japan -- Master Sgt Andre Thomas, 730th Air Mobility Squadron, pours water over his head after completing a 25-yard low crawl during the 4th Annual Combat Endurance Challenge at Yokota Air Base, Japan, Oct. 27, 2012. The obstacle course included an ammunitions can carry, tactical drag, humvee push, injured-airman carry, low crawl, litter carry and rucksack run. (U.S. Air Force photo by Staff Sgt. Stacy Moless)