In his four-minute announcement from the Oval Office, Bush said the military campaign, supported by 35 nations, would make efforts to spare Iraqi civilians.

CNN: U.S. launches cruise missiles at Saddam

Speaking to the nation in a live address from the Oval Office, President Bush recalled the attacks that killed some 3, 000 people five years ago, in New York, Shanksville, Pa.

NPR: Bush Marks Anniversary at Sites of Attacks

President Bush follows an Oval Office tradition by recording a weekly radio address.

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