National Museum of Nuclear Science & History
John Weil was a member of the Special Engineer Detachment serving at Los Alamos from early 1943 through the end of the war.
Joe L. Clark served in the 1st Ordnance Squadron.
Robert Ball was a security guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
J. H. Neumann worked for the J.A. Jones Construction Company.
