If I do something, it's always 90% obvious and 10% unknown.

I always had the dream of flying, and the cheapest way is to become a skydiver.

Aviation - and space travel, in particular - have always been especially captivating.

I always feel the danger because you might always be subject to an unexpected or emergency event.

As a little kid, I climbed a lot of trees because I always loved the bird's-eye view.

People should decide 'are you willing to spend all this money to go to Mars?' I think the average person on the ground would never spend that amount of money - they have to spend it on something that makes sense and this is definitely saving our planet.