National Museum of Nuclear Science & History
J. E. Sampson worked for the United States Engineer District Office.
O. A. Kincaid worked for the J.A. Jones Construction Company.
Joseph Kouba was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Margaret M. Emmerson was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
