North Korea May Have Conducted Nuclear Test

A South Korean news agency is reporting that North Korea has performed its first-ever nuclear weapons test. South Korean officials couldn't immediately confirm the Yonhap news report. Yonhap says South Korean president Roh Moo-Hyun has convened a meeting of security advisers over the issue. The north said last week it would conduct a nuclear test as part of its deterrent against a possible U.S. invasion.