National Museum of Nuclear Science & History
Jas Nighbert worked for Clinton Laboratories at the X-10 Reactor.
Hokanson worked at the 300 at Hanford during the Manhattan Project.
George Allen served in the US Armed Forces and flew B-29s in the air force during World War Two. He did not see action, but was in Alamogordo, New Mexico, when the Trinity Test was conducted and witnessed the explosion from afar.