I've been very lucky to have had a supportive family, a great education, enormous opportunity and challenge.

One can't erase the tremendous burden of apartheid in 10 years, 20 years, I believe, even 30 years.

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.

We know that weapons, heavy weapons continue to flow across the border from Russia into Ukraine. And we have now, in recent days, indications that Russians - Russian military units themselves have, on occasion, fired into Ukraine.

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 can't let others judge information for us.

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.