'Kryptos' Sculptor Drops New Clue In 20-Year Mystery

The Kryptos puzzle at CIA headquarters in Langley, Virginia

Visit the CIA's website for more on the Kryptos puzzle, and the artist behind it. Courtesy of James Sanborn hide caption

itoggle caption Courtesy of James Sanborn

Two decades ago, the CIA commissioned a sculpture to grace one of the courtyards at its headquarters in Langley, Va. The sculptor who won the commission, Jim Sanborn, designed a curving copper wall with a secret code embedded across four panels.

Code-breakers eventually cracked the first three, but the fourth panel continues to stump even the pros at the CIA and the National Security Agency.

So now, for the first time in 20 years, Sanborn is dangling a new clue to the mystery. He joins All Things Considered guest host Mary Louise Kelly to talk about the clue, which first appeared in Sunday's New York Times.

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