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.
John H. Harrington, Jr. served as a sergeant 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.
Tompkins worked for Stone and Webster Engineering Corporation.