Here’s a link to Blair’s speech to Congress. Here’s the joint press conference later.

An excerpt:

We are bound together as never before.
This coming together provides us with unprecedented opportunity but also makes us uniquely vulnerable.
The threat comes because, in another part of the globe, there is shadow and darkness where not all the world is free, where many millions suffer under brutal dictatorship; where a third of our planet lives in a poverty beyond anything even the poorest in our societies can imagine; and where a fanatical strain of religious extremism has arisen, that is a mutation of the true and peaceful faith of Islam and because in the combination of these afflictions, a new and deadly virus has emerged.
The virus is terrorism, whose intent to inflict destruction is unconstrained by human feeling; and whose capacity to inflict it is enlarged by technology.
This is a battle that can’t be fought or won only by armies. We are so much more powerful in all conventional ways than the terrorist. Yet even in all our might, we are taught humility. In the end, it is not our power alone that will defeat this evil. Our ultimate weapon is not our guns but our beliefs.
There is a myth. That though we love freedom, others don’t, that our attachment to freedom is a product of our culture. That freedom, democracy, human rights, the rule of law are American values or Western values. That Afghan women were content under the lash of the Taliban. That Saddam was beloved by his people. That Milosevic was Serbia’s saviour.
Ours are not Western values. They are the universal values of the human spirit and anywhere, any time, ordinary people are given the chance to choose, the choice is the same. Freedom not tyranny. Democracy not dictatorship. The rule of law not the rule of the secret police.
The spread of freedom is the best security for the free. It is our last line of defence and our first line of attack.
Just as the terrorist seeks to divide humanity in hate, so we have to unify it around an idea and that that idea is liberty.