National Museum of Nuclear Science & History
H. R. Grady worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Gamble worked in the United States Engineer District Office.
J. M. Dawson worked at the 300 Area at Hanford during the Manhattan Project.
Ralph Steinhardt was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
