We could have human intelligence in orbit around Mars, building things there.

American greatness was elevated significantly after Sputnik.

Fear and worry are emotions that cloud the mind from being able to think clearly, to remember what the procedures are to deal with that emergency.

There are always door openings. And gradually, it accumulates. The opportunities open up in front of you.

Armstrong described the lunar surface as 'beautiful.' I thought to myself, 'It's not really beautiful. It's magnificent that we're here, but what a desolate place we are visiting.'

There should be an international lunar base. That is certainly doable.

Trips to Mars, the Moon, even orbit, will require that we provide astrotourists with as many comforts from home as possible, including paying each other.