National Museum of Nuclear Science & History
Roy Williams worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Twichell worked at 200 West Area at Hanford during the Manhattan Project.
J. J. De Groot worked for the J.A. Jones Construction Company.
John Klein was a member of the Special Engineering Detachment. He worked at the Metallurgical Lab at the University of Chicago and at Los Alamos.
