Bill Clinton: “America must be willing to assume the obligations and the risks of leadership.”

I thought he was a good president.

I don't think any person with a straight face can tell you that Katrina was caused by global warming. But what we do know, what the evidence shows, is that there is an increase in the number and severity of bad weather events all across…

Diverse groups make better decisions than homogenous ones do.

I think we’re in good shape for the fall.