National Museum of Nuclear Science & History
Samual Watson was a machinist from Kirksy, Kentucky employed at Oak Ridge, Tennessee during the Manhattan Project.
William Steadman was a guard at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Philipp Klein was a part-time switchboard operator in the SAM Lab while studying chemical engineering at Columbia University.
Raemer E. Schreiber (1910-1998) was an American physicist. Schreiber joined the Manhattan Project at Los Alamos in November 1943 along with his wife, Marguerite Schreiber.