Marlin S. Hanson

Helen E. Krinek

Helen E. Krinek was a research assistant in the Health Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Henry C. Cox

Ruby Siler

Ruby Siler worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Cyrus R. Harvey

Harvey worked in the United States Engineer District Office.