You know, I go around the country a lot.

So I decided on science when I was in college.

I was always very interested in science, and I knew that for me, science was a better long-term career than tennis.

When you can feel that close to something you're used to seeing from this great distance, well, it changes a person.

The most anxious time was during launch, just because that is so dramatic.

So I saw many planets, and they looked just a little bit brighter than they do from Earth.

The pressure suit helps if something goes wrong during launch or re-entry - astronauts have a way to parachute off the shuttle. The suits protect you from loss of pressure in case of emergency.