Sean Patterson, Armed Forces Medical Examiner System Department of Defense DNA Quality Management Section DNA Analyst, replaces U. S. Navy Fireman 1st Class Billy James Johnson's picture background, signifying him as an identified service member who was previously missing in action. Johnson marks the 200th service member to be identified following the December 7, 1941 Pearl Harbor attack where 429 U.S. Sailors and Marines were killed on the USS Oklahoma (BB-37). (U. S. Air Force photo by Staff Sgt. Nicole Leidholm)