National Museum of Nuclear Science & History
Egbert Sudlow installed phone systems at all of the major facilities at Oak Ridge, Tennessee.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Ralph Steinhardt was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
C. D. Knable worked for the J.A. Jones Construction Company.