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.

Mars is far more attractive as an outpost colony for earthlings than the moon is.

Weve got to go [back to the moon]. But we dont want to stay too long. ... The ultimate goal is Mars.

At 10,000 feet, the 3 parachutes would come out, a little lower the pressure of the atmosphere outside was greater than inside, and we could smell the salt air and it was very encouraging to return to earth.

To appropriately respond to an emergency requires a very clear mind, to cooly analyze what the observations are and how to fix it.

To move forward, what's required is a unified space agenda based on exploration, science, development, commerce, and security.

There should be an international lunar base. That is certainly doable.