Ralph A. DeNunzio

Leo P. Hassen

Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

E. W. Baker

Baker worked at the 300 Area at Hanford during the Manhattan Project. 

J. L. Swanson

Frank Marisco

Frank Marisco worked for the H. K. Ferguson Company.