USS George Washington - 24 November 2010
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S Korea and the United States hold joint naval drill

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.

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