Ice bridge
EIELSON AIR FORCE BASE, Alaska -- Master Sgt. Andy Harper and Tech. Sgt. Scott Fletcher, both from the 354th Civil Engineer Squadron, use an auger to measure the ice thickness. If the ice is not thick enough, water pumps will be placed in the drilled hole to help build the ice bridge. The ice bridge takes about five weeks to complete in sub-zero weather. It is five-foot deep, a mile long and capable of supporting more than 110 tons -- which completely vanishes a few months later. The ice bridge helps 354th CES members access and perform annual maintenance on Eielson?s training and bombing ranges. (U.S. Air Force photo by Airman Jonathan Snyder).