There's a real opportunity to have a vertical takeoff and landing electric supersonic jet.

I do think there is a lot of potential if you have a compelling product and people are willing to pay a premium for that. I think that is what Apple has shown. You can buy a much cheaper cell phone or laptop, but Apple's product is so much better than the alternative, and people are willing to pay that premium.

Silicon Valley has some of the smartest engineers and technology business people in the world.

The lessons of history would suggest that civilisations move in cycles. You can track that back quite far - the Babylonians, the Sumerians, followed by the Egyptians, the Romans, China. We're obviously in a very upward cycle right now and hopefully that remains the case. But it may not.

In order to have your voice be heard in Washington, you have to make some little contribution.

I'm glad to see that BMW is bringing an electric car to market. That's cool.

You have to be pretty driven to make it happen. Otherwise, you will just make yourself miserable.