The Samoa tsunami demonstrates a problem for early warning systems - massive waves crashed ashore before researchers could analyze the earthquake and sound the alarm. A second earthquake struck near Samoa Wednesday, where the death toll has topped 150.
A Chinese delegation visited Kim Jong-il this week to press for reengagement on the North's nuclear program. The US, which has said it's open to talks, must deal with a deeply suspicious S. Korean leadership.
Ai Weiwei, who helped design Beijing's Olympic stadium, is recovering from brain surgery in Europe after being assaulted by an officer who broke into his hotel room in August. Mr. Ai has been a critic of China's handling of its 2008 earthquake.