NY Times 
Friday, May 21st, 2010
TOKYO — Secretary of State Hillary Rodham Clinton harshly condemned North Korea on Friday for a deadly torpedo attack on a South Korean Navy warship last March, and promised to marshal an international response in the coming week with Japan, China and other countries.
“I think it is important to send a clear message to North Korea that provocative actions have consequences,” she said after meeting here with the Japanese foreign minister, Katsuya Okada. “We cannot allow this attack on South Korea to go unanswered by the international community.”
Mrs. Clinton declined to lay out the potential options for a response, saying that would be premature. But she left little doubt that the United States would undertake an intensive diplomatic effort to craft a response to the sinking of the Cheonan, which killed 46 sailors and was one of the biggest military provocations on the Korean Peninsula since the Korean War.
Among the options being considered by South Korean and American officials is a United Nations Security Council resolution, and joint naval exercises with South Korea that could include anti-submarine warfare operations. South Korea may also cut off its remaining trade with the North.