North Korea

Korean Tensions Grow as South Curbs Trade to North
By CHOE SANG-HUN
Moves by President Lee Myung-bak amounted to the most serious actions the South could take short of an armed retaliation for what Mr. Lee called the deliberate sinking of a South Korean warship.

NEWS ANALYSIS
On North Korea, China Prefers Fence
By SHARON LaFRANIERE
Chinese leaders face two unpalatable options: mollify North Korea or join the U.N. Security Council in condemning it.