I know: If you're looking down at Earth, you're looking through an atmosphere that has a bit of haze in many places and not just occasional clouds.

I don't think we're going to build a 50-person spacecraft or a 100-person spacecraft.

The guys who walk on Mars are going to be historic.

I understand that Detroit was a pretty rough place to grow up in the '70s and '80s.

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

There's no doubt who was a leader in space after the Apollo Program. Nobody came close to us. And our education system, in science, technology, engineering and math, was at the top of the world. It's no longer there. We're descending rather rapidly.

A space program that truly goes somewhere! With his deeds, not only words, President Obama has revitalized our struggling space program.