It's time to open the space frontier to citizen explorers.

Space travel for everyone is the next frontier in the human experience.

By refocusing our space program on Mars for America's future, we can restore the sense of wonder and adventure in space exploration that we knew in the summer of 1969. We won the moon race; now it's time for us to live and work on Mars, first on its moons and then on its surface.

I think both the space shuttle program and the International Space Station program have not really lived up to their expectations.

When the time comes to start building deep space transports and refueling rocket tankers, it will be the commercial industry that steps up, not another government-owned, government-managed enterprise.

Space tourism is a logical outgrowth of the adventure tourist market.