On Earth Day I made a commitment to reduce our emissions of greenhouse gases to 1990 levels by the year 2000. And I asked for a blueprint on how to achieve this goal. In concert with all other nations, we simply must halt global warming. It is a threat to our health, to our ecology, and to our economy. I know that the precise magnitude and patterns of climate change cannot be fully predicted. But global warming clearly is a growing, long-term threat with profound consequences. And make no mistake about it, it will take decades to reverse.

There's nothing wrong with making mistakes. Just don't respond with encores.

If you believe in a security strategy - a strategy of more friends and fewer enemies, a strategy of greater cooperation and a strategy of keeping America better at home as we grow more diverse - we have to build the minds and hearts to build this kind of world.

Running helps me stay on an even keel and in an optimistic frame of mind.

Life is a journey towards truth, we have something to learn from each other, and everybody ought to have a chance to make the journey. So for us, a community is just made up of anybody who accepts the rules of the game, everybody counts, everybody has a role to play, everybody deserves a chance and we all do better when we work together

I think it's crazy for us to play games with our children's future. We know what's happening to the climate, we have a highly predictable set of consequences if we continue to pour greenhouse gases into the atmosphere.

We need to be creating a world that we would like to live in when we're not the biggest power on the block.