A sculpture with a secret message at CIA headquarters in Langley, Virginia, has stumped amateur code breakers for a quarter-century.
Elonka Dunin, a software developer from Nashville, Tennessee, has spent the better part of two decades trying to unravel the mystery of Kryptos.
Tony Youngblood from Here & Now contributor Nashville Public Radio has her story.
Reporter
Tony Youngblood, reporter for Nashville Public Radio. He tweets @tonyyoungblood.
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