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In 1990, an enigmatic sculpture with four encoded messages written on its surface was revealed at the CIA headquarters in Langley, Virginia. One of them has remained unsolved for over 30 years.
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By The Ringer4.6
58915,891 ratings
In 1990, an enigmatic sculpture with four encoded messages written on its surface was revealed at the CIA headquarters in Langley, Virginia. One of them has remained unsolved for over 30 years.
Learn more about your ad choices. Visit podcastchoices.com/adchoices

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