Walking around on the moon was significantly easier than we'd thought it would be. There weren't any balance problems, so you weren't tumbling over.

Exploration is wired into our brains. If we can see the horizon, we want to know what's beyond.

There's no doubt that there will be many trials and tribulations along the way in taming space for the benefit of all, unmasking its truths and using the boundless resources available to us. Taking a chance allows us to seek new horizons -- and we all benefit from being horizon hunters.

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

I'm not in favor of just taking short-term isolated situations and depleting our resources to keep our climate just the way it is today.

Some things just can't be described. And stepping onto the moon was one of them.

My expertise is the space program and what it should be in the future based on my experience of looking at the transitions that we've made between pre-Sputnik days and getting to the moon.