Obama: Sanctions for N. Korea missile SEOUL, March 25 (UPI) -- President Barack Obama Sunday said in Seoul that a planned North Korean rocket launch would only further isolate the country from the international community. "I'll simply say North Korea will achieve nothing by threats or by provocations," he said at a joint news conference with South Korean President Lee Myung-bak. Obama said he would possibly withhold about 240,000 tons of food aid the United States promised to North Korea in exchange for a moratorium on nuclear and missile tests last month, South Korea's Yonhap news agency reported. Lee said the proposed long-range rocket launch would be in direct violation of a U.N. Security Council resolution and pointed out that North Korea could face tightening international sanctions. "The two countries agreed that North Korea's announcement of a planned long-range rocket launch is a violation of a U.N. Security Council resolution and an agreement between the United States and North Korea," Lee said. Therefore, we concurred that North Korea should immediately withdraw the planned launch and abide by its international obligations.