The space shuttle is a better and safer rocket than it was before the Challenger accident.

After the Challenger accident, NASA put in a lot of time to improve the safety of the space shuttle to fix the things that had gone wrong.

I slept just floating in the middle of the flight deck, the upper deck of the space shuttle.

On a standard space shuttle crew, two of the astronauts have a test pilot background - the commander and the pilot.

No, I think most astronauts recognize that the space shuttle program is very high-risk, and are prepared for accidents.

I would still like to go up in the space shuttle. It's appalling that the accident happened, but it was an accident and obviously if I knew there was any risk, I'd be foolish to do it. I'd love to stand outside the Earth and look at it. Extraordinary feeling that, something that we've been tied to for millions of years, and a handful of people have looked at it, to be able to do that would be stunning.