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On October 11, 2001, one month after the terrorist assault on the World Trade Center and the Pentagon, President George W. Bush faced a terrifying prospect. At that morning's daily presidential intelligence briefing, George Tenet, the director of central intelligence, informed the president of reports from a CIA agent code-named Dragonfire that al-Qaeda terrorists possessed a 10-kiloton nuclear bomb, evidently stolen from the Russian arsenal. According to Dragonfire, the weapon was in New York City.

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