Irving L. Ellis

Leo P. Hassen

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

H. R. Balls

H. R. Muldoon

H. R. Muldoon worked for the Union Carbide & Carbon Corporation.

Jack L. Gosnell

Jack Gosnell worked for Clinton Laboratories at the X-10 Reactor.