Joseph E. Fraker Jr.

Ralph E. Nelson

Ralph Nelson was a staff worker at Los Alamos during the Manhattan Project.

Zola DiMartino

Zola DiMartino worked for the Roane-Anderson Company.

Helena Calloway

Helena Calloway was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Norman T. Bensen