S Korea and the United States hold joint naval drill
28 November 2010 Last updated at 05:34 GMT
South Korea and the United States have started joint military exercises, amid heightened tension in the wake of North Korea's deadly attack on a South Korean island.
A US aircraft carrier and other naval vessels have joined South Korean ships in live-fire and bombing drills.
The BBC's Jack Izzard reports on the military and political events in the Yellow Sea.