National Museum of Nuclear Science & History
Walter F. Arnold was a staff member at Los Alamos during the Manhattan Project.
Fredrick “Fred” D. Johnson was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Jacob Y. Bontekoe served as 2nd lieutenant in the 393rd Bombardment Squadron. He was regularly assigned to the B-29 Top Secret.
