National Museum of Nuclear Science & History
O'Brien worked for Stone and Webster Engineering Corporation.
Howard Peters was a truck driver for the Hanford, Washington facilty from July 1943 to December 1946.
Robert Schaffer was an American chemist. Schaffer was born in Brooklyn, and studied at Brooklyn College.
Don Crockett worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Joseph Murray was a staff worker at Los Alamos during the Manhattan Project.