National Museum of Nuclear Science & History
Chellberg worked for Stone and Webster Engineering Corporation.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
H. F. Priest worked for the Union Carbide & Carbon Corporation.
Elizabeth Howlett was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
