Climate change constitutes a serious threat to global security.

I think that to the extent that we focus on problems where we can build a moral and a political consensus, then I think that we move the country forward and when we are divided and our politics is focused on dividing, then I think we're less successful, not just from the perspective of the Democratic Party or the Republican Party but from the perspective of the nation as a whole.

My sister is a teacher, so I am a strong support of teachers, but I'm not going to be bound by just a certain way of talking about these things, in order for us to move forward on behalf of our kids.

Having the United Kingdom in the European Union gives us much greater confidence about the strength of the transatlantic union and is part of the cornerstone of institutions built after World War II that has made the world safer and more prosperous.

Reading is important. If you know how to read then the whole world opens up to you

The Muslim call to prayer is one of the prettiest sounds on Earth at sunset.

We're showing that there's no excuse for other nations to come together, both developed and developing, to achieve a strong global climate agreement next year.