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 do believe, separate and apart from any particular election or movement, that we are going to have to guard against a rise in a crude sort of nationalism or ethnic identity or tribalism that is built around an us and a them.

If poverty is a disease that infects the entire community in the form of unemployment and violence, failing schools and broken homes, then we can't just treat those symptoms in isolation . We have to heal that entire community.

At a certain point you can't help but lose some feel for what's on the ground because you're not on the ground.

We have Jews, Muslims, Hindus, atheists, agnostics, Buddhists, and their own path to grace is one that we have to revere and respect as much as our own

Occasionally I would like the German people to give us the benefit of the doubt, given our history, as opposed to assuming the worst -- assuming that we have been consistently your strong partners and that we share a common set of values.

I would love to see an America where race is understood in the same way that the ethnic diversity of the white population is understood.