When the time comes to start building deep space transports and refueling rocket tankers, it will be the commercial industry that steps up, not another government-owned, government-managed enterprise.

Mars is the symbolic and totally stimulating next objective that could so dominate the next century's exploration efforts. From Mars, the resources of all the asteroids will become readily available.

A family needs to work as a team, supporting each other's individual aims and aspirations.

It's been one of the greatest challenges that ever came along in my life; it was one of the more difficult things to do.

Save the taxpayer's money by canceling the Ares 1 and V.

I expected the unexpected and went [on the Moon] with an open mind. I think the visual scene was described by my words on first landing - "magnificent desolation." Magnificent for the achievement of being there, and desolate for the eons of lifelessness.

The way I see it, commercial interests should manage a lunar base while NASA gets on with the really important task of flying to Mars.