National Museum of Nuclear Science & History
Hatfield worked in the United States Engineer District Office.
J. C. McAndrews worked for the Roane-Anderson Company.
Edward F. Kolley was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Frederick H. Zimmerli served in Project Alberta.
John Fletcher worked for the Tennessee Eastman Corporation at the Y-12 Plant.
