Test and Research 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: Full Size (1.56 MB) Tags: Navy Photo By: Navy Petty Officer 3rd Class Manuel Najera, DOD VIRIN: 190923-D-KT024-0170C.JPG Photo Gallery