William P. Hofmann

F. R. Lewis

Frank Mackie

Born in 1903 in Baltimore, Mackie studied civil engineering at Union College in Schenectady, New York.

Alan Bell

Alan Bell worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Margaret M. Emmerson

Margaret M. Emmerson was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.