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

Having walked on the Moon, I know something about what we need to explore, really explore, in space.

One of the major problems with long-term deep space human flight is the requirement for radiation shielding.

Monumental achievements by humanity should be done by major organizations as much together as possible.

I didn't start skiing until I was 50. My wife Lois taught me how to ski. I'm proficiently conservative.

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

Mars is far more attractive as an outpost colony for earthlings than the moon is.