George L. Arnold

Douglas P. Rouse

Douglas Rouse worked for the United States Engineer District Office.

Hal Grammer

Arthur H. Jaffey

Arthur Harold Jaffey was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Leanne Russell

Leane Russell was a biologist at the Metallurgical Laboratory in Chicago during the Manhattan Project.