National Museum of Nuclear Science & History
R. J. Guthrie worked for the Watson-Flagg Engineering Company.
Richard Recker served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Johnson worked at the 100-B Area at Hanford during the Manhattan Project.
Joseph Kouba was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
