National Museum of Nuclear Science & History
R. H. Elder worked for the Edenfield Electric Company.
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Edna Shea worked for the United States Engineer District Office as confidential secretary to Col. Stafford Warren, MD.
Ole G. Landsverk was a member of the health physics team at the University of Chicago Metallurgical Laboratory during the Manhattan Project.
