GRISSOM AIR RESERVE BASE, Ind. -- Using an acetylene torch, Staff Sgt. Dennis Jewel solders together two pipes during a recent training exercise held here by the 434th Civil Engineer Squadron. Sergeant Jewel is a heating, ventilation and air conditioning specialist with the 434th CES. (U.S. Air Force photo/Tech. Sgt. Mark R. W. Orders-Woempner)
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