Obama: U.N. must act to prevent nuclear attack

President Obama called the United Nations Security Council to order today and issued a grave warning: The prospect of a nuclear attack on a major city.

"Just one nuclear weapon exploded in a city -- be it New York or Moscow, Tokyo or Beijing, London or Paris -- could kill hundreds of thousands of people, and it would badly destabilize our security, our economies and our very way of life," Obama said.

The first U.S. president to chair a U.N. Security Council meeting, Obama added that "the United Nations has a pivotal role to play in preventing this crisis."

Over the next 12 months, Obama said, he will work with Russia on a new nuclear cuts and work for global agreements to reduce production of fissile material...(Read More)