Details of some US nuclear missile bunkers in Europe, which contain live warheads, along with secret codewords used by guards to signal that they’re being threatened by enemies, were exposed for nearly a decade through online flashcards used for education, but which were left publicly available. The astonishing security blunder was revealed by investigative journalism website Bellingcat, which described what it found after “simply searching online for terms publicly known to be associated with nuclear weapons.” The flashcards “detail intricate security details and protocols such as the positions of cameras, the frequency of patrols around the vaults, secret duress words that signal when a guard is being threatened and the unique identifiers that a restricted area badge needs to have,” Bellingcat reported.

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