National Museum of Nuclear Science & History
Hugo Leckelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Frederick Hobbs worked for the United States Engineer District Office.
James F. Schumar was a metallurgist. In 1940, he became Chief Metallurgist at Wolverine Tube Company.
Emily Ninger was a staff worker at Los Alamos during the Manhattan Project.