Bush was warned of attacks

Members of the United States Congress want to know if the government was given enough information to head off the 11 September attacks. Their comments come after the White House admits President Bush was told a month before 11 September of a plot to hijack American planes by Osama Bin Laden.

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What did Bush know?

President Bush

The White House insists it took "all appropriate action" in response to the warnings of attacks on the United States it received last summer. The US intelligence community has already been heavily criticised for its failure to detect warning signs of the 11 September suicide attacks on New York and Washington.

The BBC's Nick Bryant reports

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Bush on the defensive

Rice: counter-terrorism officials met almost daily in the summer of 2001

President Bush publicly defends his administration's handling of the terrorism warnings. Speaking on the White House lawn, he said if he'd known that the enemy was going to use aeroplanes in an attack he would have done everything possible to protect the American people.

The BBC's Stephen Sackur reports