If we go back to the moon, we're guaranteed second, maybe third place because while we are spending all that money, Russia has its eye on Mars. Landing people on the moon will be terribly consuming of resources we don't have. It sounds great - 'Let's go back. This time we're going to stay.' I don't know why you would want to stay on the moon.

There are always door openings. And gradually, it accumulates. The opportunities open up in front of you.

Sending a couple of guys to the Moon and bringing them back safely? That's a stunt! That's not historic.

I'm not in favor of just taking short-term isolated situations and depleting our resources to keep our climate just the way it is today.

As we begin to have landings on the moon, we can alternate those with vertical launch of similar crew modules on similar launch vehicles for vertical-launch tourism in space, if you want to call it that adventure travel.

Is the destiny of the human species to sit back and play with our mouse and computer and imagine, fantasize?

We can continue to try and clean up the gutters all over the world and spend all of our resources looking at just the dirty spots and trying to make them clean. Or we can lift our eyes up and look into the skies and move forward in an evolutionary way.