National Museum of Nuclear Science & History
William Browne worked for the H. K. Ferguson Company.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Ruth Hillard was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Frank E. Nicola served in the 603rd Air Engineering Squadron.
