North Korea Is Warned by Gates on Testing

The defense secretary warned North Korea that the U.S. will not accept it as a nuclear-armed state.

Gates to Reassure Allies in Asia Over North Korea

Defense Secretary Robert M. Gates said that the United States had detected no unusual military movement in North Korea, and had no plans to reinforce American forces in South Korea.

South Korea and U.S. Raise Alert Level

The move was the latest sign of escalating tensions after North Korea conducted its second nuclear test on Monday.

Opinion: North Korea Misfires

Global reaction to the nuclear test is likely to be swift and unforgiving. The repeated provocations will have diminishing returns for Pyongyang.

North Korea Threatens Military Strikes on South

North Korea said it would retaliate if its ships were stopped as part of a U.S.-led anti-proliferation effort.

South Koreans Express Fatigue With a Recalcitrant North

After years of hope that relations with the North would thaw if the South tried to coax it into engagement, regional experts and others speak of growing disenchantment.

Leadership Mystery Amid N. Korea’s Nuclear Work

Political uncertainty and Kim Jong-il’s questionable health are two of the issues that contribute to a diplomatic challenge facing the Obama administration.

North Korea Is Said to Test-Fire 3 More Missiles

North Korea fired three missiles into the sea near Japan and said it was “fully ready for battle” against the United States.

Test Delivers a Message for Domestic Audience

As North Korea announced the detonation of a nuclear device, its primary audience may be its own population.

Tested Early by North Korea, Obama Has Few Options

President Obama’s aides say he is seeking a tougher U.S. response than after North Korea’s 2006 nuclear test, but much will depend on Russia and China.

Governments Urge Security Council Action

North Korea’s nuclear test drew protests and threats to punish the regime in Pyongyang with tighter sanctions.

Seismic Readings Appear to Point to a Small Nuclear Test

Despite initial reports, it will be days or weeks before it can be determined if the test was successful and if it was a nuclear detonation.

North Korea Claims to Conduct 2nd Nuclear Test

North Korea said it had successfully conducted its second nuclear test, raising the stakes in the effort to get the nation to give up its nuclear weapons program.

South Korea grants 'right to die'

South Korea's Supreme Court has upheld a landmark ruling giving a brain-dead woman the right to die.