This was on 9th floor of old Manhattan office building. Um, what? Aren't fallout shelters supposed to be underground?pic.twitter.com/ka6cumx9OW
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@JustineLavaworm 60 cm of concrete will cut gamma ray exposure by a factor of 1000... would you say there were two-foot concrete walls?
@chaosprime You started metric then switched to ye olde weirdarse measurements and lost me.
@JustineLavaworm oops :) just ignore the furlongs and stick with 60 cm then
@chaosprime Nah. The walls def. ain't that thick.
@JustineLavaworm either they've got a few cm of lead inside them or that fallout shelter sign is indeed a febrile lie, then
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