Tensions on the Korean Peninsula continue to mount. On Friday, the United Nations Security Council agreed to a new round of sanctions against North Korea. North Korea responded by vowing to step up its nuclear bomb-making program by producing more plutonium and uranium. North Korea also threatened war on any country that dared to stop its ships on the high seas under the new sanctions. South Korean President Lee Myung-bak is headed to Washington for summit talks Tuesday with President Barack Obama.