National Museum of Nuclear Science & History
Part of the Special Engineer Detachment (SED), Donald C. Harms was first sent to Oak Ridge, Tennessee, to work on the Manhattan Project.
Ralph Nelson was a staff worker at Los Alamos during the Manhattan Project.
Robert J. Arnson served in the 1st Ordnance Squadron.
William “Bill” J. Knox was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
