If we go back to the moon, we're guaranteed second, maybe third place because while we are spending all that money, Russia has its eye on Mars. Landing people on the moon will be terribly consuming of resources we don't have. It sounds great - 'Let's go back. This time we're going to stay.' I don't know why you would want to stay on the moon.

I'm not in favor of just taking short-term isolated situations and depleting our resources to keep our climate just the way it is today.

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

It's time to open the space frontier to citizen explorers.

I've led a life of such structured discipline and always had a goal in mind of knowing what I was doing, from West Point to the Air Force combat, MIT, looking for new things to study and get involved in. And then I got into the space program, and how disciplined can you get?

Astronauts working for the government will always need to be either pilots or mission specialists. Those who want to be pilots should have military experience - ideally, a test pilot background.

They didn’t tell me I was going into space until after they locked the shuttle doors and started counting down.