September 11 was, and remains, above all an immense human tragedy. But September 11 also posed a momentous and deliberate challenge not just to America but to the world at large. The target of the terrorists was not only New York and Washington but the very values of freedom, tolerance and decency which underpin our way of life.

They could have been removed. They could have been hidden. They could have been destroyed.

This is not a battle between the United States of America and terrorism, but between the free and democratic world and terrorism.

The Donald Trump phenomenon in the U.S. is mirrored completely by the Brexit phenomenon in the U.K. It's very similar forces. And what is interesting to me is there are two different groups that come together, who don't really agree with each other, but have come together in unity against, if you like, what is perceived as the status quo, or - and certainly what is a more center-right or center-left type of politics.

We are all internationalists now, whether we like it or not...

In retrospect, the Millennium marked only a moment in time. It was the events of September 11 that marked a turning point in history, where we confront the dangers of the future and assess the choices facing humankind.

The threat from Saddam Hussein and weapons of mass destruction - chemical, biological, potentially nuclear weapons capability - that threat is real.