I felt pretty confident in relieving myself, since I had the urge.

Instead of planning the retirement of the Space Shuttle program, America should be preparing the shuttles for their next step in space: evolving, not shutting them down and laying off thousands of people.

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.

There were about six years when there was not one American who went into space. We shouldn't do that again.

When President Kennedy took office, I was in the midst of my education.

Unfortunately, pioneers will always pave the way with sacrifices.

My favourite thing to do on this planet is to scuba dive.