I left Earth three times and found no other place to go. Please take care of Spaceship Earth.

As a child I went to a circus. They had a man shot out of a cannon into a net. I became intrigued with what was going on.

We spent a lot of time in simulators. We were going to do it right.

I don't go along with going to Moon first to build a launch pad to go to Mars. We should go to Mars from Earth orbit. We have already been to the Moon; we've already practiced.

A little levity is appropriate in a dangerous trade.

When people have asked if I'd like to go in the Shuttle, I said you don't get to fly it, except for landing, which I'd love to do. I wouldn't go unless I could command it

Kids today don't want to get married. Too many of their friends have been married and divorced already. They just don't believe in it