If you begin to think you're something you're not, you're looking in the wrong mirror.

To become an astronaut, someone has to have a dream of his own to do something that he or she has always wanted to do, then commit himself to making that dream come true.

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.

Am I willing to go to Mars? Yes, but I'm not willing to spend nine months getting there, then wait 18 more months until the planets align to come home.

I've been asked about UFOs and I've said publicly I thought they were somebody else, some other civilization.

It's our destiny to explore. It's our destiny to be a space-faring nation.

Today, we are on a path of decay. We are seeing the book close on five decades of accomplishment as the leader in human space exploration.