National Museum of Nuclear Science & History
Joe Langston worked for the J.A. Jones Construction Company.
Hollenbach worked at the 200 West Area at Hanford during the Manhattan Project.
Jack L. Callan was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
E. C. Armstrong worked for the Tennessee Eastman Corporation at the Y-12 Plant.
