Experimental Foam Naval Research Lab Chemical Engineer Katherine Hinnant tests an experimental aqueous film-forming foam at the NRL in Washington, Sept. 23, 2019. NRL scientists are conducting research to support the Defense Department’s effort to replace firefighting foams containing fluorine. SHARE IMAGE: Download Image: Small (0 KB)| Medium (0 KB)| Full Size (1.68 MB) Tags: Navy Photo By: Navy Petty Officer 3rd Class Manuel Najera, DOD VIRIN: 190923-D-KT024-0143C.JPG Photo Gallery