Calvin Payne

Joseph H. Heartberg

Joseph H. Heartberg was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

H. R. Johnson

Johnson worked at the 100-B Area at Hanford during the Manhattan Project. 

A. J. MacDonald

A. J. MacDonald worked for the Union Carbide & Carbon Corporation.

G. M. Allen