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

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.

I am a team player - and that is what you need to be an effective point guard. You gotta see the court, you gotta set up the play, and you gotta let others execute for the most part. I don't throw elbows for the sake of throwing elbows, but if somebody throws one at me and it's necessary to respond in kind, I suppose I can if I have to.

The notion that I had become a political lightning rod was painful for me to experience.

There is not an inherent contradiction between a Ukraine that has longstanding historic and cultural ties to Russia, and a modern Ukraine that wants to integrate more closely with Europe.

Well, I think by any expectation South Africa has come a tremendously long way. We've seen a society that many people thought couldn't withstand a peaceful transition to democracy without a great deal of violence, in fact, make that transition and do it in relative peace and security.

President Obama has got the most moderate temperament.