National Museum of Nuclear Science & History
Neil Bergen was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Henry J. Wollweber was a guard at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Donald Engelkemeior was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Hattie Frankling worked for the Tennessee Eastman Corporation at the Y-12 Plant.