It's a strange, eerie sensation to fly a lunar landing trajectory not difficult, but somewhat complex and unforgiving.

I believe that the message of Apollo XI was that in the spirit of Apollo, a free and open spirit, you can attack a very difficult goal and achieve it, if you can all agree and work together to achieve that goal.

I suspect that even though the various questions are difficult and many, they are not as difficult and many as those we faced when we started the Apollo [space program] in 1961.

I am, and ever will be, a white-socks, pocket-protector, nerdy engineer - born under the second law of thermodynamics, steeped in steam tables, in love with free-body diagrams, transformed by Laplace, and propelled by compressible flow.

I think if there was anything I learned from our skipper was that it's not how you look; it's how you perform.

There are people I'll always love to listen to, and I'm always ending up discovering new songs by them, which is crazy. Like Stevie Wonder.

Now and then I miss the excitement about being in the cockpit of an airplane and doing new things.