Airmen stay sharp with HAZMAT exercise
Senior Airman Jason Holmes, 316th Civil Engineer Squadron firefighter, connects a gate valve to a fire hydrant during a hazarous material exercise Feb. 1, 2010, at Joint Base Andrews, Md. The valves helps the firefighter slowly release water to the fire engine to control pressure changes and make sure there is no air in the hose that could damage the engine. (U.S. Air Force photo by Airman 1st Class Perry Aston)

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Tags: 11th Wing
Photo by: Airman st Class Perry Aston |  VIRIN: 100201-F-6188A-019.JPG