What comes after the moon? I think you can guess: Mars.

NASA needs to focus on the things that are really important and that we do not know how to do. The agency is a pioneering force, and that is where its competitive advantage lies.

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.

A mind concerned about danger is a clouded mind. It's paralyzing.

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

Apollo 11 will probably go down in history as one of the major responses of two nations facing each other with threatening technologies - sometimes called mutually assured destruction. It was also the America's response to the apparent superiority of the Russians in putting objects into space before USA could.

The biggest benefit of Apollo was the inspiration it gave to a growing generation to get into science and aerospace.