National Museum of Nuclear Science & History
P. D. Simpson worked for the Poe Piping & Heating Company.
Walter Main worked for the United States Engineer District Office.
Jack Rose was a machinist and armorer in the Special Engineering Detachment (SED) assigned to the 509th Composite Group in Wendover, Utah.
Ruth Hillard was a technician at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
