Climate is a global issue. Coal is still the energy that is being used more than anything else to make electricity. The United States is using less as we're turning more to gas. But, around the world, that's what they're using.

I was fifteen in college at Tulane. I lied about my age in college so that I could be normal socially. So that girls would go out with me and stuff like that. I just said I was normal age.

Strong states and blocs of strong states are the only source of power and legitimacy capable of driving an international agenda in today's world.

Academics were not a challenge when I was fifteen in college. The challenge was figuring out how to fit in socially.

Berlin is still a very edgy place, a very cosmopolitan place. It's a place where completely different ideas and cultures come together and clash in a very warm way. In a very warm-hearted way. It's a very young city. It's a vibrant city. It's an exciting city. It's a city that's also scarred by history. I think that's to be celebrated and graffiti is to be celebrated. Graffiti in Berlin is very different than when they spray something on the wall dividing the west bank and Israel. And should be treated as such in Berlin.

I don't take things off. I either check things off or I add things.

The two world wars boosted American power and devastated potential rivals to an extent that could not have lasted more than a few decades.