National Museum of Nuclear Science & History
Arnold Grubbe (1904-2002) was an engineer working for the civilian contractor Crane Company in Oak Ridge, Tennessee.
Allan worked at the 200 West Area at Hanford during the Manhattan Project.
D. V. Parker worked for the Roane-Anderson Company.
Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
