We revisited a number of technical and financial challenges and the work being done to address them.

But having said that…now we need people to take this from the concept stage to the time we're actually building hardware…and getting ready to launch these systems.

This is a go-as-you-can-afford-to-pay kind of program.

Pursue a field you love and have passion for. With passion you will succeed in the end.

We can't have 10,000 people on the ground at the Kennedy Space Center.

We can't dial the cost here, in this case. So we've had to focus on affordability.

One of our objectives will be to put a chemical plant on Mars.

I don't think it's a foregone conclusion that you may have to abandon the Moon. What we're headed for on the Moon is a South Pole analog…some kind of camp that we set up and sustain ourselves for months at a time, not years.

That's not affordable. The future workforce for launch vehicles can't be as big as it is for shuttle.