National Museum of Nuclear Science & History
O. L. Koch worked for the Midwest Piping and Supply Company.
Mathias A. Klinger was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Olsen worked in the 200 East Area at Hanford during the Manhattan Project.
Roy E. Dodgen served in the 393rd Bombardment Squadron.
H. M. Metcalf worked for the Tennessee Eastman Corporation at the Y-12 Plant.
