National Museum of Nuclear Science & History
J. P. Underwood worked for the Roane-Anderson Company.
Charles H. Hendren served in the 603rd Air Engineering Squadron.
W. A. Cone worked for the J.A. Jones Construction Company.
Joseph Levinger was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Ralph Nelson was a staff worker at Los Alamos during the Manhattan Project.
