National Museum of Nuclear Science & History
Sanford McDonnell was a mechanical engineer with the Special Engineering Detachment at Los Alamos from April 1944 to April 1946.
A. T. Helgerson worked for the Tennessee Eastman Corporation at the Y-12 Plant.
J. L. Frye worked for the Roane-Anderson Company.
Robert H. Shumard served as a sergeant in the 393rd Bombardment Squadron. He worked as an assistant engineer, aiding the other crew engineers with keeping the planes running during bombing missions.
