National Museum of Nuclear Science & History
Engel worked in the United States Engineer District Office.
Richard Emanatian was with the military police detachment at Los Alamos during the war. He maintained secrecy through the rest of his life, and his family only found about his involvement long after his death.
Johnston worked at the 300 Area at Hanford during the Manhattan Project.
Frei worked for Stone and Webster Engineering Corporation.
Eugene W. Darre served in the 603rd Air Engineering Squadron.
