National Museum of Nuclear Science & History
P. N. Smith worked for the H. K. Ferguson Company.
Frank E. Keene was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
R. B. Smith worked for the Union Carbide & Carbon Corporation.
Alfred “Al” Zeltmann was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
