URGENT ¥¥¥ Obama vows 'firm' action against N.Korea

President Barack Obama on Tuesday vowed to take "firm action" alongside US allies against the "provocations" of North Korea after the communist state carried out its third nuclear test.

"Provocations of the sort we saw last night will only isolate them further, as we stand by our allies, strengthen our own missile defense and lead the world in taking firm action in response to these threats," Obama told Congress.