Interest soars in solving the CIA's 'Kryptos'

For 15 years, a sculpture known as Kryptos has stood in a courtyard inside the heavily guarded Central Intelligence Agency headquarters in Langley, Virginia. Its coded message, made up of thousands of letters on a copper scroll, has stumped code breakers for 15 years. And although it's been seven years since anyone has made any progress cracking it, there's been an explosion of renewed interest in Kryptos since writer Dan Brown hid references to it on the jacket of The Da Vinci Code -- one of the hottest books in North America. [More]