National Museum of Nuclear Science & History
Clarence Joyce worked for the Poe Piping & Heating Company.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Harold Fidler was an Army major and a civil engineer for the Corps of Engineers. Fidler began working at the Radiation Laboratory at Berkeley with Ernest O.
Flannigan worked in the United States Engineer District Office.
