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    HomeNewsPhotos   Planes over water
        
            AIR FORCE PHOTOS
   NPC
                Shown is the patient entrance of a Negatively Pressurized Conex, or NPC. The NPC has high-efficiency particulate air filters and blowers that make the air pressure inside the NPC less than that of the aircraft cargo area essentially making it function like a laboratory clean room. (U.S. Air Force graphic by Travis Burcham)

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