As president I will end this war in Iraq: Obama

Obama promises to an electrified crowd to bring troops home within 16 months after he's elected.

"The America I believe in is an America that can lead the world against the 21st century challenges we face," he says. "Chicago, our moment is now. This is our moment."

"I don't want to be presiden of red America or blue America, I want to be present of the United States of America."