Only a large-volume market like space travel can attack the barrier of high costs.

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

To appropriately respond to an emergency requires a very clear mind, to cooly analyze what the observations are and how to fix it.

I realize that my life is not the common ordinary person.

I think both the space shuttle program and the International Space Station program have not really lived up to their expectations.

I was motivated to improve the U.S. strategy of going back to the moon in 1985. That's a long time ago. Going back to the moon would be a great achievement for tourism adventure flights.

As a youngster, I read of Buck Rogers and Flash Gordon. As a student, I wrote English reports on science fiction. And as a fighter pilot, I observed the selection of the Mercury astronauts. All this was fascinating, but I really didn't think I would ever be a part of it. It was only when my good friend Ed White was selected as a Gemini astronaut that I decided to join NASA as part of the Apollo program.