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After WWII, Scientists Conducted Deadly Tests With an Unexploded Nuclear Bomb Core | Smart News| Smithsonian Magazine
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Gray Haired Poomie on Twitter: "75 yrs ago, Louis Slotin's screwdriver slipped. The 2 neutron-reflecting beryllium shells closed shut. The plutonium core went supercritical & released tons of radiation. Models like on
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