National Museum of Nuclear Science & History
Ledbetter worked in the 200 East Area at Hanford during the Manhattan Project.
A. S. Preston worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Paul R. O’Connor was a junior chemist at the University of Chicago Met Lab during the Manhattan Project.
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.
