Albert T. Hays

H. J. Ratjen

H. J. Ratjen worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Martha G. Johnson

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

Robert Engel

J. H. Kistler

Kistler worked in the 200 West Area at Hanford during the Manhattan Project.