Secretary of State Hillary Rodham Clinton said on Friday that evidence was "overwhelming" that a North Korean submarine sank a South Korean warship and that the communist country must face international consequences for its actions. Speaking in the Japanese capital at the outset of a three-nation Asian trip, Clinton said that the US, Japan, South Korea and China are consulting on an appropriate reaction. She said the report proves a North Korean sub fired a torpedo that sank the ship, the Cheonan, in March and that it could no longer be "business as usual" in dealing with the matter. "The evidence is overwhelming and condemning. The torpedo that sunk the Cheonan and took the lives of 46 South Korean sailors was fired by a North Korean submarine and the United States strongly condemns this act of aggression. As Minister Okada and I discussed, we will be in deep and constant consultations not only between the United States and Japan, but also with South Korea, China and others to determine our response." "I think it is important to send a clear message to North Korea that provocative actions have consequences. We cannot allow this attack on South Korea to go unanswered by the international community. So we will determine our best options moving forward and send a clear, unmistakable message to North Korea regarding the international community's and most particularly its neighbours' concerns about its behaviour and I look forward to being able to work out the details over <b>...</b>