There are a lot of reasons for not doing something. And if humanity had come up with all the reasons for not doing something we wouldn't have spread across the Earth the way we have. There's a curiosity, and I would submit that that curiosity will put human beings on the surface of Mars.

There are always door openings. And gradually, it accumulates. The opportunities open up in front of you.

I think I need to continue to think and plan and marry all of the different things that we could do that make transportation in space from the earth to the space station, from the earth to the moon to space stations around the moon to visiting an asteroid.

The beauty of Hawaii probably surpasses other places. I like the Big Island and the two mountains, Mauna Loa and Mauna Kea, where you can look out at the stars.

Somebody would think I was trying to get favored treatment because my ancestors had the name Moon. And that's a joke.

We need to have people up there who can communicate what it feels like, not just pilots and engineers.

People communicate in Twittering ways. I've learned how to do that.