I think sometime we will go to Mars and I think we'll explore it with humans sometime, but I think it's really wise to do all the robotic exploration ahead of time and learn as much as possible. Once we have learned as much as possible with the robots, then that's the time to send people, and let them then continue the research that the robots have started.

Americans just want us to... not be concerned if they can be constitutionally justified... Why, if we had to do that we could not pass most of the laws we enact around here.

I think that it's good for us to be able to travel in space and do research in space, and I emphasize the research, because space travel to me is far more than just seeing how far we can go.

America had an emphasis on the individual and so education became available for everyone.

I don't know what you could say about a day in which you have seen four beautiful sunsets.

Just because I'm 77 doesn't mean I don't have a dream.

I hate to think that we may be out there seven to ten years out and dependent on the Russians for our journey into space.