Word: sealedroom
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...anyone unfortunateenough to be at ground zero. But people living amile or so from the bomb may not be immediatelykilled. For them, the danger lies in radioactivebits of pulverized earth and buildings that fallto the ground in the hours and days following theexplosion. A fallout shelter is simply a sealedroom that has walls thick enough to block thesedangerous radioactive particles. To be federallyapproved, a shelter must be able to block out97.5% of the outside radiation...
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