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HVAC: Keeping you cool

Tech. Sgt. Bruce Burton replaces a relay on an environmental conditioning unit at Ali Base, Iraq. Sergeant Burton is with the 407th Expeditionary Civil Engineer Squadron heating, ventilation and air conditioning flight. He is deployed from the Vermont Air National Guard's 158th Fighter Wing. (U.S. Air Force photo/Master Sgt. Jon Hanson)

VIRIN: 060428-F-0000S-003.JPG
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