WASHINGTON - President Bush on Wednesday acknowledged for the first time that the CIA runs secret prisons overseas and said tough interrogation forced terrorist leaders to reveal plots to attack the United States and its allies.

Bush said 14 suspects - including the mastermind of the Sept. 11 attacks and architects of the 2000 bombing of the USS Cole and the U.S. Embassy bombings in Kenya and Tanzania - had been turned over to the Defense Department and moved to the U.S. detention center at Guantanamo Bay, Cuba, for trial.

"This program has been, and remains, one of the most vital tools in our war against the terrorists," Bush said.

"Were it not for this program, our intelligence community believes that al-Qaida and its allies would have succeeded in launching another attack against the American homeland."

Releasing information declassified just hours earlier, Bush said the capture of one terrorist just months after the Sept. 11 attacks had led to the capture of another and then another, and had revealed planning for attacks.

Nearing the fifth anniversary of Sept. 11, Bush pressed Congress to quickly pass administration-drafted legislation authorizing the use of military commissions for trials of terror suspects. Legislation is needed because the Supreme Court in June said the administration's plan for trying detainees in military tribunals violated U.S. and international law.

Currently there are no detainees being held by the CIA, Bush said. A senior administration official said the CIA had detained fewer than 100 suspected terrorists in the history of the program.

Still, Bush said that "having a CIA program for questioning terrorists will continue to be crucial to getting lifesaving information."

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Associated Press writer Anne Plummer Flaherty contributed to this report.