National Museum of Nuclear Science & History
Sherman Fried was a chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Bartholomew "Bart" Rivers was an instrument technician at the Hanford, Washington facility from 1943 through the end of the war.
Blalock worked for Stone and Webster Engineering Corporation.
T. U. Foster worked for the H. K. Ferguson Company.