National Museum of Nuclear Science & History
R.J. Stepheson was a consultant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Jano Haley worked on the Manhattan Project at Los Alamos. He was married to Ruth Haley, who also worked at Los Alamos.
Luther Percy was a research associate at the Chicago Met Lab.
Andrew Walker was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.