National Museum of Nuclear Science & History
M. J. Wheat worked for the Midwest Piping and Supply Company.
Melvin S. Friedman was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
George Schaeffer was a staff worker at Los Alamos during the Manhattan Project.
Johnson worked for Stone and Webster Engineering Corporation.
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
