National Museum of Nuclear Science & History
Arthur Sievert worked for Hanley & Company.
C. W. Winter worked for the Union Carbide & Carbon Corporation.
Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Catherine Cordoba worked at the Houdaille Hershey plant in Decatur, Illinois on the night shift of the plating department.
