It is manifestly in the interest of the United States to deal with the very real threat that climate change poses. And that's why President Obama has worked so hard to reduce our own emissions and to lead internationally in forging the Paris climate agreement.

Bashar al-Assad and those who still stand by him are now responsible for the deaths of more than 20,000 in Syria.

Well, Nigeria has played a constructive role in peacekeeping in various parts of West Africa. But unless and until Nigeria itself is democratic and respects human rights, it too may well be a source of much greater instability as political repression limits the ability of the people of Nigeria to achieve their full potential.

We have some straight journalism, but then we have opinion and perspective. And I think a lot of people, especially young people, don't know how to tell the difference, and aren't motivated to tell the difference.

Change doesn't happen with people sitting on their behinds, getting lazy.

I think one of the real issues that we're faced with is how we consume news, how the media is perceived, how fake news is gaining a degree of currency without criticism that is dangerous, in my judgement.

The notion that -- which some people are trying to suggest, that by asking for the identity of an American person, that is the same as leaking it, is completely false. There's no equivalence between so-called unmasking and leaking.