Senior Airman William Fields checks the continuity on fuses to determine if the load safeties are deficient from the main power line to the condensing air conditioning units at Fairchild Air Force Base, Washington on July 21, 2014. As a heating, ventilation and air conditioning journeymen, Fields daily work is mostly consumed with preventative maintenance on infrastructure equipment throughout the base. The 92nd Civil Engineer Squadron is responsible for keeping all air conditioning systems running, heating, cooling, refrigeration and some domestic water heaters. (U.S. Air Force photo by Staff Sgt. Samantha Krolikowski/Released)
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