We, therefore, here in Britain stand shoulder to shoulder with our American friends in this hour of tragedy, and we, like them, will not rest until this evil is driven from our world.

Now, again, what the center ground has got to do is to respond to people's genuine concerns and fears.

So much of politics is about the daily grind of political business: the people to see, the myriad different facets of government, the remorseless agenda of this part of the media or that.

If you've got communities that feel they've been left behind, if you've got - as you do in Britain at the moment, you have communities that believe they're being changed by immigration, that they don't have job opportunities, and that they're disregarded and that they don't - they've got no stake in a future which embraces globalization, you've got to address that issue.

We have taken a situation in the U.K. because of concerns, for example, over immigration and other things, so Britain now is on a path out of Europe.

Do I know I'm right? Judgements aren't the same as facts. Instinct is not science. I'm like any other human being as fallible and as capable of being wrong. I only know what I believe.

If we take all this actions and if it turns out not be true, we have reduced pollution and have better ways to live, the downside is very small. The other way around, and we don’t act, and it turns out to be true, then we have betrayed future generations and we don’t have the right to do that.