I think America has a responsibility to maintain its leadership in technology and its moral leadership in the world, to explore, to seek knowledge.

OK, let's get this mother out of here.

Perhaps the two greatest moments of my life were standing on the moon and being outside of the room when my granddaughter was born! We tend not to remember the worst.

After Apollo 17, America stopped looking towards the next horizon. The United States had become a space-faring nation, but threw it away. We have sacrificed space exploration for space exploitation, which is interesting but scarcely visionary.

One of the most important things about the geology on the moon is your descriptions of what you see, comparing them to things that you've seen on Earth so that the geologists and the scientists on the ground would know what you're talking about; and then take pictures of them.

Curiosity is the essence of human existence.

Get the shuttle out of the garage. It's in its prime of its life. How could we just put it away?