National Museum of Nuclear Science & History
Opal MacDonald was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Edward E. Kregar served in the 1st Ordnance Squadron.
Andrew G. Demo served in the 393rd Bombardment Squadron.
John Wieneke was an American physicist who worked at Los Alamos during the Manhattan Project. Wieneke later worked on the post-war nuclear program at the Nevada test site in the 1950s.
