"I was always a little uncomfortable with the level of celebrity that came with the moon landing."

"The views of the Earth from the moon, they're not just pictures, they're experiences."

"I believe that the Good Lord gave us a finite number of heartbeats and I'm damned if I'm going to use up mine running up and down a basketball court."

"The important achievement of Apollo was demonstrating that humanity is not forever chained to this planet, and our destiny is out in the stars."

"I think the one thing that we are not doing enough today is encouraging young people to take risks."