President Obama is funny, he's thoughtful, he's challenging, he's fun to work with - and it's been an extraordinary privilege.

You can't sit on the sidelines and read your iPhone and be on social media and expect everything to be cool. You have to be part of this.

The United States really only accounts for about 3 percent of the economic engagement with Russia. Europe is 40 percent, and so Europe's contribution to this pressure is far more than symbolic. It's very practical. And that's one of the many reasons why we have worked hard to remain in close coordination with our European partners.

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

You have to make change.

Nobody's tried to touch my hair in like, in decades.

Peace, prosperity, and democracy cannot endure if imposed from the outside. We should cease to make false distinctions between peacekeeping and prevention; they are in fact inextricably linked.