I think we've, again, got to be extremely careful; otherwise we'll misunderstand what's going on in Iraq and in Syria today. Of course, you can't say that those of us who removed Saddam in 2003 bear no responsibility for the situation in 2015.

For me, 9/11 was a game changer. It altered my perception of the security threat we faced. I took the position that Britain should be shoulder to shoulder with the U.S. It was a big decision; I didn't take it lightly, or in ignorance of its consequences. It's a big commitment for a country to give, but I believed it was the right thing to do.

The best philanthropy is not just about giving money but giving leadership. The best philanthropists bring the gifts that made them successful-the drive, the determination, the refusal to accept that something can't be done if it needs to be into their philanthropy.

What I don't know is whether there is a way politically that you can beat away these, some of these populist movements because in the end I don't think they really do provide answers. They ride the anger. But they don't really have the answers. Or whether this is an experiment we're just going to have to go through first.

Look, I am very competitive.

My faith foundation works to bring about a greater respect and understanding between different faiths. We basically work with six popular religions in the world which are the three Abrahamic religions, Hinduism and Buddhism and Sikhism.

The view we took at the time and we take it now is that the war was justified legally because he [Saddam Hussein] remained in breach of UN resolutions.