Saudi hijackers first came into contact with al-Qaeda and went through Terrorism 101 when they signed up for the jihad in Afghanistan.

Almost all the students who make it to Caltech, one of the best scientific universities in the world, come from public schools. So it can be done.

The thing you have to remember is, oil and gas are commodities, and the more we use them the more the price goes up, like any commodity. Solar, wind - they are technologies, so the more you use them, the more the price goes down.

Iraq today does have a chance to shape its own future. They may not do that, or this generation may not do that. But maybe the next one will, I don't know. They may try and fail, and stumble, get up and fall back.

You'll know the green revolution has been won when the word 'green' disappears.

What I want is natural gas to be a bridge to a cleaner energy future, not a dam against a cleaner energy future, not a dead end. To get this right, to get the most out of it, we not only have to make sure we exploit natural gas in a clean way - it's a challenge - but we also have to make sure that we are instilling and implementing all the incentives to win solar, nuclear energy efficiency that will make them continually competitive with natural gas in the future.

A vision without resources is an hallucination.