Both countries claim that the other started it; but the lengthy exchange of artillery fire between the two countries has left two South Korean soldiers dead, 15 wounded. South Korea says the trouble started when the North fired shells at a small fishing island in the Yellow Sea. Some 1600 residents of the island — reportedly mostly fishermen — are fleeing or entering bomb shelters. South Korea has declared a state of emergency and the U.S. has declared its support. What really started the fight?
We're joined by Mark McDonald, South Korea correspondent for our partner The New York Times, for more on the story. We're also joined by David E. Sanger, chief Washington correspondent for the New York Times and author of "The Inheritance: The World Obama Confronts and the Challenges to American Power."