I've raised three kids: my wife and I have three kids. I've observed through direct contact the adults they are now is partially the product of where they came from and what we did. With them growing up, but partially how they were wired at birth.

Our three big emergencies are fire, loss of pressurization or contaminated atmosphere. Any of those things in a spaceship are very deadly and time critical. Everybody's trained, but I'm the commander of the ship, and it's up to me to decide.

Ever since I was nine years old and I watched Neil and Buzz walk on the moon, I have felt passionately that this is an interesting human adventure. This is one of the things we're doing that is really fundamentally important, as we leave our home planet, but also exciting.

Although simulators are great for building step-by-step knowledge of a procedure, the worst thing that can happen in a sim is that you get a bad grade on your performance.

You can't get rid of it with exercise alone. You can do the most vigorous exercise and only burn up 300 calories in an hour. If you've got fat on your body, the exercise firms and tones the muscles. But when you use that tape measure, what makes it bigger? It's the fat!

I think I used to sort of segregate things. Work was this and life was this and exercise was this. And I feel as I get older, or I become more relaxed, I feel like wellness is my whole being.

Exercise? I get it on the golf course. When I see my friends collapse, I run for the paramedics.

I'm a health-food junkie, so all of my food is a splurge, money-wise!