I'll reach up with the shuttle arm, almost like passing a baton from the new arm to the old arm,

I've had a chance to fly a lot of different airplanes, but it was nothing like the shuttle ride.

When I did my spacewalks, it was during space station construction. So the shuttle was docked to the fledgling ISS at the time. So we would always stay tethered.

To be one of the world's top space robotic arm operators is a necessary skill for an astronaut, but it doesn't have much carry-over.

In the astronaut business - the shuttle is a very complicated vehicle; it's the most complicated flying machine ever built. And in the astronaut business, we have a saying, which is, 'There is no problem so bad that you can't make it worse.'

Dr. Gunther talked about passing the baton to others and that is what we are doing. We hope we have helped educate and empower all of you and we thank you for your support.