Firefighting foam at Dover AFB, Del.
Mr. Barry Williams, a civilian fire fighter with the 436th Civil Engineer Squadron, Fire Department, works the nozzle of a ladder truck hose while perched on the elevated ladder on Sept. 16, 2013 at Dover Air Force Base, Del. Williams is spraying the foam to dissipate it so clean-up efforts can begin. (U.S. Air Force photo/Greg L. Davis)

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