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U.S. Air Force Staff Sgt. Gerald Leon Guerrero, 379th Expeditionary Civil Engineer heating ventilation and air conditioning craftsman, pours soapy water onto copper pipes at Al Udeid Air Base, Qatar, Aug. 28, 2014. The soapy water creates bubbles that indicate where there a leak may originate in the pipes. Leon Guerrero is from Tamuning, Guam, and is deployed from Cannon Air Force Base, New Mexico. (U.S. Air Force photo by Staff Sgt. Ciara Wymbs/Released)
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