Lee and Obama to discuss North Korean threats

As North Korea threatens nuclear war, President Barack Obama and South Korean President Lee Myung-bak will be eager to show the North the unity of their alliance and a determination not to back down.
North Korea's pledge to expand its nuclear programs gives their meeting Tuesday at the White House a sense of urgency. The presidents probably will express their refusal to accept the North as a nuclear weapons state and condemn recent missile and nuclear tests