Robert J. Buettner

Joseph Caldwell

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

J. P. Valliant

J. P. Valliant worked for the Union Carbide & Carbon Corporation.

Vito Di Rienzo

Vito Di Rienzo worked in bomb assembly for the 1st Ordinance Squadron, 509th Composite Group. Di Rienzo was drafted into the military in 1943 at the age of 20.

Edward H. Fieder