The Great Lie of the American Fallout Shelter https://t.co/qobUsz8U22 via @Mic @noradshelters 8192 and 32767 protection factor, 1960s 100 PF
— Walton McCarthy (@noradshelters) November 23, 2016
from Twitter https://twitter.com/noradshelters
November 23, 2016 at 01:45PM
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