Members of the 319th Civil Engineer Squadron heat ventilation and airconditioning shop discuss how to attach a hose to the base’s synthetic natural gas farm pipeline, Jan. 27, 2014 on Grand Forks Air Force Base, N.D. The 319th CES contributed over ninety after duty work hours to ensure the base’s heating supply was consistent. (U.S. Air Force photo/Senior Airman Xavier Navarro)
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