I'll tell you, being involved in human space flight, it is an emotional endeavor. I think it brings in the highest highs and the lowest lows.

I've experienced the highest of highs and lowest of lows. I think to really appreciate anything you have to be at both ends of the spectrum.

It's been a high-low year for me. The highest of highs, the lowest of lows.

Well, with so many space shuttle missions that we've done, I think it's just sort of natural that each one hasn't necessarily gotten the attention that the early ones did.

For me, the best times are always going to be the most intense, the ones with the highest highs and the lowest lows.

That's what we want to do here at Johnson Space Center. I think what we have always brought to NASA and brought to the country is trying to push the boundaries, trying to go to the next level.