Not much new here, but this is an interesting quote:
Can we be sure that terrorism and weapons of mass destruction will join together? Let us say one thing. If we are wrong, we will have destroyed a threat that is at its least responsible for human carnage and suffering. That is something I am confident history will forgive. But if our critics are wrong, if we are right - as I believe with every fibre of instinct and conviction I have that we are - and we do not act, then we will have hesitated in the face of this menace, when we should have given leadership. That is something history will not forgive.
Edited copy of Blair's speech to Congress at The Independent.