G. C. Houston

H.G. Johnson

Edward J. Fredrick

Edward J. Fredrick was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

E. R. Smallwood

E. R. Smallwood served in the 509th Headquarters.

John J. Norton

John J. Norton was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.