We feel that this stands as a symbol of the insatiable curiosity of all mankind to explore the unknown.

I inherited depression from my mother's side of the family. Her father committed suicide. She committed suicide the year before I went to the moon.

We must still think of ourselves as pioneers to understand the importance of space.

I've been to the Titanic in a yellow submarine and the North Pole in a Russian nuclear ice breaker.

I am definitely not rich.

Fighter pilots have ice in their veins. They don't have emotions. They think, anticipate. They know that fear and other concerns cloud your mind from what's going on and what you should be involved in.

Unless we are able to commit to a permanent growing settlement [on Mars], then I don't think just going there with humans and coming back is worth doing. The expense of planning to come back is like the people who left Europe to come to America and then to turn around and go back to Europe, it really doesn't make any sense at all.