A mind concerned about danger is a clouded mind. It's paralyzing.

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

Being first outside the spacecraft would bring much more responsibility, and I really wasn't looking for that.

I don't believe any pair of people had been more removed physically from the rest of the world than we were.

Mars could very well be a staging location for the resources of the asteroid belt. We have to learn how to get a payback somewhere, but it's beyond Mars that the real payoff will come from minerals.

Because of his military service, Dad was buried in Arlington National Cemetery.

Going to Mars would evolve humankind into a two-planet species.