U.S. Air Force Chief Master Sgt. James Laurent, 35th Fighter Wing command chief, pours chemicals into the supply side of the boilers at the main boiler plant on Misawa Air Base, Japan, July 10, 2012. Without maintenance, the boiler becomes unusable after two years. However, when cleaned annually, the boiler will last for 20 years. (U.S. Air Force photo/Tech. Sgt. Marie Brown)

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Photo by: Tech. Sgt. Marie Brown |  VIRIN: 120710-F-BW907-155.JPG