Edmund H. Longfellow

Ralph Brooks

Ralph Brooks worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Norman F. Parks

Helen R. Hughes

Helen R. Hughes was a laboratory technician in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

William M. Hackman

William Hackman worked for the Tennessee Eastman Corporation at the Y-12 Plant.