National Museum of Nuclear Science & History
Ed Helfenberger worked for the Roane-Anderson Company.
H. J. Mack worked for the Edenfield Electric Company.
Peter Watkins was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
R. A Winkel worked for the Union Carbide & Carbon Corporation. At Oak Ridge he assisted in the development of the K-25 plant.
