I had said from the start that I thought Iraq was a mistake, that we should have stayed focused on Afghanistan. I think it was the right decision because the Taliban at that point had gotten a lot of momentum before I'd gotten into office, partly because we hadn't been paying attention as much as we needed to to Afghanistan.

I think the American people recognize is after a decade of war it's time to do some nation building here at home. And what we can now do is free up some resources, to, for example, put Americans back to work, especially our veterans, rebuilding our roads, our bridges, our schools, making sure that, you know, our veterans are getting the care that they need when it comes to post-traumatic stress disorder and traumatic brain injury, making sure that the certifications that they need for good jobs of the future are in place.

The path of America's development is never a straight line. Sometimes we move in ways that are forwards; sometime that seem back.

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.

I hope that this [hacking] does not continue to be viewed purely through a partisan lens.I think there are Republicans as well as Democrats who are concerned about this.

Mandela's commitment to democracy was ratified not only by his election, but by his willingness to step down from power

The US and Australia have a lot in common. One of the things we have in common is we produce a lot of carbon.