CNN.com - Blair warns of WMD terror threat

"September 11 did not create the threat Saddam posed. But it altered crucially the balance of risk as to whether to deal with it or simply carry on, however imperfectly, trying to contain it," Blair said.

Former chief U.N. weapons inspector Hans Blix said Friday the Iraq war was illegal, raising fresh concerns over the UK attorney general's advice on the use of military action.

In an interview in The Independent newspaper, Blix said a U.N. resolution explicitly authorizing the use of force should have been adopted to justify the conflict.

"I don't buy the argument the war was legalized by the Iraqi violation of earlier resolutions," he told the British newspaper.