The biggest benefit of Apollo was the inspiration it gave to a growing generation to get into science and aerospace.

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.

I inherited depression from my mother's side of the family. Her father committed suicide. She committed suicide the year before I went to the moon.

I think humans will reach Mars, and I would like to see it happen in my lifetime.

We should go boldly where man has not gone before. Fly by the comets, visit asteroids, visit the moon of Mars. There's a monolith there. A very unusual structure on this potato shaped object that goes around Mars once in seven hours. When people find out about that they're going to say 'Who put that there? Who put that there?' The universe put it there. If you choose, God put it there.

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.

I'm sure that there are places in the deserts in Australia that could be similar to where we might want to go on Mars.