Jeff Bezos: I think most of the world recognize that we should go to the Moon first. We'll go to Mars and we'll do all the other things. But the Moon is the first best step and there are many reasons for that. But it's kind of a gift. It's so near Earth. We can get there in three and a half days. We can return in three and a half days. You can go anytime you want. You don't have to wait for the planetary alignment to be just right. And you can only go to Mars every two years or so. And so there are a lot of advantages to the Moon. The Moon’s gravity well is much lower than Earth’s, so when you get materials from the Moon, you can lift them off the Moon using about 28 times less energy per kilogram than is needed to lift something off Earth.