Now, I swore an oath to uphold the laws on the books... Now, I know some people want me to bypass Congress and change the laws on my own... Believe me, the idea of doing things on my own is very tempting. I promise you. Not just on immigration reform. But that's not how - that's not how our system works. That's not how our democracy functions. Thats not how our Constitution is written.

I said that America’s role would be limited; that we would not put ground troops into Libya; that we would focus our unique capabilities on the front end of the operation and that we would transfer responsibility to our allies and partners.

We do need to make sure that we have an orderly, lawful immigration process.

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.

The friendship that we established early on in our marriage ... that carries you through tough times. That and a good sense of humor.

In fact, the best thing we could do on taxes for all Americans is to simplify the individual tax code. This will be a tough job, but members of both parties have expressed an interest in doing this, and I am prepared to join them.

The reason I take pride for that is one of the things you worry about when you're in the bubble, and there's all this pomp and circumstance and hail to the chief is, do you lose touch with what you thought was important and what brought you here? And I'm proud that I don't think I have lost touch.