We didn't use the shuttle robot arm before, so this has been a training flow to get ready for that.

Although I know a lot of the previous shuttle flights, in theory, had their tasks laid out; but there were still some changes that came along for them.

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

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.

We didn't use the shuttle robot arm before, so this has been a training flow to get ready for that.

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.