Wrapping up strategic and economic consultations with top Chinese officials, Secretary of State Hillary Clinton heads next to South Korea. Tensions on the peninsula are running high since the South accused the North of torpedoing a warship in March and causing the deaths of 46 South Korean sailors. The U.S. and South Korea are planning joint anti-submarine exercises in response to the sinking, and the North is vowing to defend itself against any act of belligerency. The South has suspended much of its trade with the North and is blasting propaganda via loudspeakers across the DMZ. The North has threatened to shell the loudspeakers.