National Museum of Nuclear Science & History
MacDonald worked for Stone and Webster Engineering Corporation.
Ratterman worked at the 200 East area at Hanford during the Manhattan Project.
A. M. Monger worked for the Tennessee Eastman Corporation at the Y-12 Plant.
John Luttrell worked for the United States Engineer District Office.
Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
