People of Berlin - people of the world - this is our moment. This is our time.

I've always viewed the Paris Agreement as a starting point. If you look at all the commitments that have been made by all the countries, it's still not sufficient to deal with the very dangerous situation we face. What it has done is that it created an architecture whereby as technology improves, as we find new clean sources of energy, as we make our economies more efficient, then gradually we can turn up the dial and improve the outcomes of Paris.

I do love the Waldorf-Astoria, though. You know, I hear that from the doorstep you can see all the way to the Russian tea room.

There's no one who I believe has ever captured the soul of America more profoundly than Abraham Lincoln has.

When I came into office, the world was divided. Iran was resurgent. Iran is at its weakest point, economically, strategically, militarily, then since - then in many years. And we are going to continue to keep the pressure on to make sure that they do not get a nuclear weapon. That's in America's national interest and that will be the case so long as I'm president.

America is not the crude stereotype of a self-interested empire. Given our interdependence, any world order that elevates one nation or group of people over another will inevitably fail.

What has made America the wealthiest, most successful country on Earth historically has been our commitment to education.