Weve got to go [back to the moon]. But we dont want to stay too long. ... The ultimate goal is Mars.

Mars has a bit of air pressure; maybe we can build up that atmosphere to be a bit more accommodating to humans.

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

I failed music when I was a teenager.

It was designed to have an impact on the stalemate over Mutually Assured Destruction with the Soviet Union. Us reaching the moon convinced Gorbachev and other leaders that the Soviet Union couldn't compete with the U.S., so they revised their agenda. But people have short memories.

It's not easy to get human beings into orbit. So far only three nations have been able to do that, with all the resources that they put together. And I'm just a little skeptical that that's going to be done by the private sector without making use of what has been done by the government.

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.