To move forward, what's required is a unified space agenda based on exploration, science, development, commerce, and security.

Monumental achievements by humanity should be done by major organizations as much together as possible.

If you want to say that the sky is black, and if I'm there, even if I fall back down again, I will be weightless for a period of time - maybe that's the definition of space.

When we set out to land people on the surface of Mars, I think we should as a nation, as a world, commit ourselves to supporting a growing settlement and colonization there. To visit a few times and then withdraw would be an unforgivable waste of resources.

My first biography written in '73 was not 'Journey To The Moon.' It was 'Return To Earth.' Because for me, that was the more difficult task - disappointment.

Timing has always been a key element in my life. I have been blessed to have been in the right place at the right time.

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