Climate change constitutes a serious threat to global security, an immediate risk to our national security, and, make no mistake, it will impact how our military defends our country.

I do want to once again speak directly to the Iranian people. Yours is a great civilization with a vibrant culture that has so much to contribute to the world - in commerce and in science and in arts. For decades, your government's threats and actions to destabilize your region have isolated Iran from much of the world, and now our governments are talking with one another. Following the nuclear deal, you, especially young Iranians, have the opportunity to begin building new ties with the world.

In the United States, if 43 percent of eligible voters do not vote, then democracy is weakened.

So I think it's important to understand that your duly elected representatives have been consistently informed about exactly what we're doing.

For me, Lincoln is like just a handful of people - a Gandhi, or a Picasso, or a Martin Luther King Jr. - who is an original and captures something essential.

The conversations have been cordial. [Donald Trump] has been open to suggestions, and the main thing that I've tried to transmit is that there's a different between governing and campaigning, so that what he has to appreciate is as soon as you walk into this office after you've been sworn in, you're now in charge of the largest organization on Earth.

All of us share this world for but a brief moment in time. The question is whether we spend that time focused on what pushes us apart, or whether we commit ourselves to an effort -- a sustained effort -- to find common ground, to focus on the future we seek for our children, and to respect the dignity of all human beings.