We can't start over and develop a Saturn 5-type vehicle from scratch.

Everyone should take their hats off to Neil Armstrong. He is a humble guy who doesn't wave his own flag.

Having walked on the Moon, I know something about what we need to explore, really explore, in space.

I failed music when I was a teenager.

Training was very extensive, and we dealt with many recoveries from emergencies, and fortunately, participating and observing and existing through the reality of space was a once-in-a-lifetime experience and it was not marred by unexpected hazards or catastrophes.

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

Mars has been flown by, orbited, smacked into, radar examined, and rocketed onto, as well as bounced upon, rolled over, shoveled, drilled into, baked and even blasted. Still to come: Mars being stepped on.