GRISSOM AIR RESERVE BASE, Ind., -- Les McConnell, assistant chief of fire-prevention at the Grissom Fire Department, explains how to inspect a fire extinguisher during a fire prevention week activity at Grissom. When inspecting a fire extinguisher there should not be any yellow or white powder inside of the hose. This means that the extinguisher has been discharged and may not be working. (U.S. Air Force photo/ SrA Carl Berry)
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