The threat of Saddam Hussein with weapons of mass destruction is real, but as I said, it is not new. It has been with us since the end of that war, and particularly in the last 4 years we know after Operation Desert Fox failed to force him to reaccept them, that he has continued to build those weapons. He has had a free hand for 4 years to reconstitute these weapons, allowing the world, during the interval, to lose the focus we had on weapons of mass destruction and the issue of proliferation.

In this remarkable time for the world, I refuse to believe it's time to stop believing in the possibilities of our remarkable country. I refuse to accept the downsizing of the American Dream. I refuse to bet against American entrepreneurial spirit and American ingenuity.The competition's tough, and it requires us to be tougher - tough-minded, never hard hearted.

I will never conduct a war or start a war because we want to; the United States of America should only go to war because we have to. And if you live by that guidance, you'll never have veterans throwing away their medals or standing up in protest.

Our troops are terrorizing women and children in the dark of night in Iraq.

Unlike George Bush and his friends at the big oil companies, I'm going to work for a real energy policy for this country that decreases America's dependence on foreign oil and helps lower the costs to American families.

There's an agreement that Syria should be a unified country, united; that it needs to be secular; that ISIL needs to be taken on; and that there needs to be a managed transition, but there is a difference obviously in what that means and what that outcome may or may not be.

I'm going to be a president who believes in science.