The study of geography is about more than just memorizing places on a map. It's about understanding the complexity of our world, appreciating the diversity of cultures that exists across continents. And in the end, it's about using all that knowledge to help bridge divides and bring people together.

It's important to make sure that governments have some checks on what they do, that people can oversee what's being done so the government doesn't abuse it.

We reaffirm that on days like this, there are no Republicans or Democrats. We are Americans, united in concern for our fellow citizens.

Four years ago, I promised to end the war in Iraq. We did. I promised to refocus on the terrorists who actually attacked us on 9/11. We have. We've blunted the Taliban's momentum in Afghanistan, and in 2014, our longest war will be over. A new tower rises above the New York skyline, al Qaeda is on the path to defeat, and Osama bin Laden is dead.

Building new roads and bridges creates jobs. Growing our exports creates jobs. Reforming our outdated tax system and our broken immigration system creates jobs.

I reiterated our hope that negotiations over the United Kingdom's exit from the E.U. will be conducted in a smooth and orderly and transparent fashion and preserve as closely as possible the economic and political and security relationships between the U.K. and E.U.

By 2025 we expect new spacecraft designed for long journeys to allow us to begin the first ever crewed missions beyond the Moon into deep space. So we'll start by sending astronauts to an asteroid for the first time in history. By the mid-2030s I believe we can send humans to orbit Mars and return them safely to Earth. And a landing on Mars will follow and I expect to be around in see it.