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Tech. Sgt. Brian Virden (left) and Master Sgt. Bryan Riddell, replace legacy firefighting foam at King Salmon Air Station, Alaska, with Phos-Chek 3 percent, a C6-based Aqueous Film Forming Foam, June 14. The new AFFF protects Airmen, aircraft and infrastructure while reducing the risk of mission-related contamination to drinking water sources. Virden and Riddell are with the 611th Civil Engineer Squadron, Joint Base Elmendorf-Richardson, Alaska. (U.S. Air Force photo)
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