When the PC was launched, people knew it was important.

In order to deal with all the medical cost demands and other challenges in the U.S., as we look to raise that revenue, the rich will have to pay slightly more. That's quite clear.

At the end of the day, natural-gas peakers sit back there and get financed so that the Midwest corridor can have a huge [period] of four to five days of no wind. The peakers are running big time to make that up, because that is the swing piece that can always be turned on.

I think if you talk to the experts in any field where you have to take on a unknown challenge, where you're going to be working on it for a long time you'd find that to work themselves up to their best performance and really throw themselves into it, you know, spend all these hours in there and ah, give it their... give it their best that optimism plays a role.

Thinking about impact on children meant adding to the agenda, both the R&D agenda and the delivery agenda, but it's amazing news, even in the scale of other tragedies.

For Africa to move forward, you've really got to get rid of malaria.

Students deserve great teachers. And teachers deserve the support they need to become great.