I'm trying to construct a world that maximises the probability that SpaceX continues its mission without me.

We're developing two engines. These are state-of-the-art, world-class, world-beating engines. These are not just sort of ho-hum engines.

When I was in college, I wanted to be involved in things that would change the world.

If you're trying to create a company, it's like baking a cake. You have to have all the ingredients in the right proportion.

What I'm trying to do is, is to make a significant difference in space flight. And help make space flight accessible to almost anyone.

To make an embarrassing admission, I like video games. That's what got me into software engineering when I was a kid. I wanted to make money so I could buy a better computer to play better video games - nothing like saving the world.