National Museum of Nuclear Science & History
Attended Purdue University.
Gebhardt worked for Stone and Webster Engineering Corporation.
T. S. Whitehouse worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Arthur Buck was a security guard for the Metallurgical Laboratory (“Met Lab”) at the University of Chicago during the Manhattan Project.
Nathan Safferstein (1921-2013) was an American counterintelligence agent during the Manhattan Project.