The FBI will undergo a massive reorganization, shifting its chief priority to preventing future terrorist attacks and away from the more traditional crimes it currently investigates, Attorney General John Ashcroft announced Wednesday.

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The FBI issued a warning Friday, saying unsubstantiated information suggested terrorists were considering attacks against U.S. banks in the Northeast.

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The FBI announced a new security alert late Monday, warning that a terrorist attack could take place as early as today in the United States or against U.S. interests in Yemen.

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The following is the full text of the FBI document released Friday that profiles the "linguistic and behavioral assessments of the person responsible for mailing anthrax-laden letters on September 18 and October 9, 2001."…

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The FBI issued a warning for law enforcement to be on "highest alert" for potentially imminent terrorist attacks.

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The three New York regional airports opened briefly Thursday only to shut down abruptly after federal authorities detained a dozen men mistakenly linked to Tuesday's airplane hijackers.

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Attorney General John Ashcroft today said investigators were "reviewing intelligence" on the attacks against New York and Washington and were conducting "the most massive and intense investigation ever conducted in America" to find those at fault.

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Robert Hanssen pleaded guilty today to 15 counts of spying for Moscow, in return for a life sentence.

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