National Museum of Nuclear Science & History
Hugo Leckelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
W. N. Sparke worked for the J.A. Jones Construction Company.
Ruth Haley worked on the Manhattan Project at Los Alamos. She was married to scientist Jano Haley.
Lee E. Caylor served as a corporal in the 393rd Bombardment Squadron. He was the regularly assigned assistant engineer for the Big Stink, and he and his crew were later reassigned to Luke the Spook.