Suppose that climate change is not real and all we do is adopt green technologies, which our economy and our technology is perfectly capable of. Then all we've done is given our kids a cleaner world.

The day that I can land at the airport in Baghdad and ride in an unarmed car down the highway to the Green Zone is the day that I'll start considering withdrawals from Iraq.

I spent several years in a north Vietnamese prison camp in the dark, fed with scraps. Do you think I want to do that all over again as vice president of the United States?

I owe America more than she has ever owed me.

We must be true to ourselves. And we must be true to others, whether they believe we are or not.

How much damage will have been done before we act?

All interested parties must be willing to make significant sacrifices.