North Korea's nuclear threats

CNN's Kyung Lah reports from Seoul, South Korea, where they cope almost daily with threats from their hostile neighbors.

"This is a country that has, for more than a decade, heard this threat out of Pyongyang directed to Seoul that we're going to melt you down in a sea of fire. They're used to it," Lah says about the reaction there.

But people do notice a difference in the way North Korea is threatening their safety right now compared to what they experienced when Kim Jong-il was in charge. His son's regime is issuing threats more rapidly, triggering concerns that the South Korean government could overreact, resulting in a clash on the border.