I think the American Dream used to be achieving one's goals in your field of choice-and from that all other things would follow. Now, I think the dream has morphed into the pursuit of money: Accumulate enough of it, and the rest will follow. We've become more materialistic. For balance, I think we need to get back to idealism and patriotism, but also be realistic with our monetary goals.

No dream is too high for those with their eyes in the sky!

Certainly, I've never wanted to live on past achievements.

To send humans back to the moon would not be advancing. It would be more than 50 years after the first moon landing when we got there, and we'd probably be welcomed by the Chinese. But we should return to the moon without astronauts and build, with robots, an international lunar base, so that we know how to build a base on Mars robotically.

Many say exploration is part of our destiny, but it's actually our duty to future generations and their quest to ensure the survival of the human species.

Bravery comes along as a gradual accumulation of discipline.

The much-hyped Ares 1-X was much ado about nothing.