In the Astronaut Office we're never totally out of training, we always keep our hand in it. But after five years, things have changed and so it's been good to get back into the flow and relearn a lot of things.

I did grow up with a really big interest in math and science; I liked it.

I grew up watching a lot of the coverage of the early U.S. space program, all the way back starting with Mercury and then through Gemini and Apollo and of course going to the moon as the main part of the Apollo program.

We launch when we're kind of in the same orbit that they are in terms of being matched up in inclination in space, and we're just in a little different altitude.

In the Astronaut Office we're never totally out of training, we always keep our hand in it. But after five years, things have changed and so it's been good to get back into the flow and relearn a lot of things.

There's a lot of interest from the medical community on how things develop in microgravity, and the hope, later, that is expected to apply to what the changes are in humans as well.

It's very important to know that we packed it right because it is a safety issue for coming home.