In order for us to have a future that's exciting and inspiring, it has to be one where we're a space-bearing civilization.

I'm interested in things that change the world or that affect the future and wondrous, new technology where you see it, and you're like, 'Wow, how did that even happen? How is that possible?'

In order to have your voice be heard in Washington, you have to make some little contribution.

Today it costs over a billion dollars for a space shuttle flight. The cost… is fundamentally what's holding us back from becoming a space traveling civilization and ultimately a multi-planet species.

Today it costs over a billion dollars for a space shuttle flight. The cost… is fundamentally what's holding us back from becoming a space traveling civilization and ultimately a multi-planet species.

I'm reasonably optimistic about the future, especially the future of the United States - for the century, at least.