When I've sent young men and women into harm's way, I always understand that that is the last resort, not the first resort.

If John McCain wants to have a debate about who has the temperament, and judgment, to serve as the next Commander-in-Chief, that's a debate I'm ready to have.

Even as we do all that's necessary to ensure Israel's security, even as we are clear-eyed about the difficult challenges before us, and even as we pledge to stand by Israel through whatever tough days lie ahead, I hope we do not give up on that vision of peace. For if history teaches us anything, if the story of Israel teaches us anything, it is that with courage and resolve, progress is possible. Peace is possible.

And yes, my plan will continue to reduce the carbon pollution that is heating our planet - because climate change is not a hoax. More droughts and floods and wildfires are not a joke. They're a threat to our children's future. And in this election, you can do something about it.

But let me perfectly clear, because I know you'll hear the same old claims that rolling back these tax breaks means a massive tax increase on the American people: if your family earns less than $250,000 a year, you will not see your taxes increased a single dime. I repeat: not one single dime.

The brain is a body part too; we just know less about it.

We need to spend a trillion dollars rebuilding our schools, our roads, our basic science and research here in the United States.