National Museum of Nuclear Science & History
Edith Levin worked for the United States Engineer District Office.
L. J. Ritter worked for the Roane-Anderson Company.
W. H. Pickett worked for the United States Engineer District Office.
Leonard worked in the 300 Area at Hanford during the Manhattan Project.
Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
