Diane von Furstenberg

Clarity is the most important thing. I can compare clarity to pruning in gardening. You know, you need to be clear. If you are not clear, nothing is going to happen. You have to be clear. Then you have to be confident about your vision. And after that, you just have to put a lot of work in.

I think all races are represented in America much more than in many other places, but it's also nice to remind people about that ethnic mix. I would like to see more black models and women from different ethnic backgrounds, but I also think that when you are casting, you just choose the most beautiful girl you can find.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.