Because when we're in space, my job is primarily getting us there and getting us back.

Now you're coming back to Earth, and things are getting more and more dynamic.

Those folks out in the space suits are going to be getting beat up.

You know, Scooter's going to do the first separation burn; I'm going to do the second separation burn.

That's what Hubble can do for us. It can tell us whether the universe is expanding forever or if one day it's going to come back together.

Being in space, I'm really looking forward to working with this team of folks that I'm with.

Well, for me it really wasn't a case of deciding to be an astronaut.