U.S. Air Force Master Sgt. John Wanner (right) and Senior Airman Joselindo Ocampo from the 446th Civil Engineer Squadron use a multimeter to troubleshoot electrical issues on an M-80 water heater used in expeditionary base kitchens and latrines, as course instructor U.S. Air Force Staff Sgt. Joshua Nelson (background) from the 823rd Red Horse Squadron Detachment 1, looks on during a field exercise at Tyndall Air Force Base, Fla. on May 25, 2011. The two Airmen are part of a team of 30 Reservists from the 446th CES participating in Silver Flag 2011, a week-long training exercise designed to improve the readiness capability of Air Force civil engineers. Sergeant Wanner, of Olympia, Wash. and Airman Ocampo, of Boise, Idaho are HVAC (heating, ventilation and air conditioning) specialists with the 446th CES. (U.S. Air Force photo by Staff Sgt. Grant Saylor/Released)
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