National Museum of Nuclear Science & History
Frank Vaughan was a research associate at the Chicago Met Lab during the Manhattan Project.
Richard Highsmith worked for the Roane-Anderson Company.
Litchfield worked in the 100 F Area at Hanford during the Manhattan Project.
Stanley Liebert was a machinist in the SAM Laboratory at Columbia University between 1944 and 1945.
H. T. Ledford worked for the Tennessee Eastman Corporation at the Y-12 Plant.