I didn’t have any doubts that that was what I wanted to be doing, and I didn’t have any doubts that I would be able to do it. Up until that point, up until I joined the astronaut corps, you could say I was a professional student. I had made it through high school, undergraduate, graduate school, to a Ph.D., so I knew how to learn things. I knew how to study, I knew how to concentrate and to dedicate myself to learning one particular area, and that’s what I was doing again, so I was fairly confident and comfortable actually in the environment.