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U.S. Air Force Senior Airman Carlos Aleman, a 354th Civil Engineer Squadron range maintenance technician, uses an auger to drill a hole in the frozen Tanana River with Tech. Sgt. Craig Slaten, the 354th CES noncommissioned officer in charge of service contracts, Dec. 5, 2016, in Fairbanks, Alaska. Slaten and Aleman use the auger to drill into the ice, exposing water which will build up the ice and create a stable bridge for transportation of equipment and supplies.