Gates Warns of North Korea Missile Threat to U.S.

Defense Secretary Robert M. Gates said the country was within five years of developing a missile with the potential of hitting Alaska or the West Coast.

U.S. Concludes N. Korea Has More Nuclear Sites

American officials say they see signs that North Korea’s nuclear program is more sophisticated than was thought, adding urgency to efforts to contain it.

North Koreans Unveil New Plant for Nuclear Use

North Korea showed an American scientist last week a vast new facility it secretly and rapidly built to enrich uranium.

North Korea Calls for Better U.S. Ties

North Korea issued a New Year’s message that highlighted the reclusive country’s attempt to readjust the focus of six-party nuclear disarmament talks.

North Korea Said to Be Looting Heavy Equipment

North Korea has been stealing equipment from a nuclear power plant site where an American-led consortium stopped construction four years ago, a South Korean newspaper reported.

North Korea Vows to Produce Nuclear Weapons

Pressing forward on its nuclear weapons, the North vowed to take “military actions” against efforts to isolate it.

U.N. Security Council Pushes North Korea by Passing Sanctions

China and Russia were heavily involved in drafting the resolution to tighten sanctions targeting North Korea’s nuclear and missile programs.

North Korea Could Face New Round of Sanctions

The permanent members of the Security Council have approved a draft resolution that expands export limits and financial restrictions, diplomats said.

U.S. Weighs Intercepting North Korean Shipments

The Obama administration signaled that it was seeking a way to interdict North Korean shipments suspected of carrying weapons or nuclear technology.

Opinion: Don’t Make It Worse

Mikhail Gorbachev argues that responding to Pyongyang's nuclear test with the retaliatory logic of the Cold War could put us on a slippery slope.

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.

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.

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.

North Korea Tones Down Its Rhetoric

In a message to the former American envoy, North Korean officials said they are willing to move forward with denuclearization talks.

Tensions Rise on Korean Peninsula

South Korea placed more soldiers at frontier guard posts, a day after the North Korean military declared an “all-out confrontational posture” against the South.

North Korea Says It Has ‘Weaponized’ Plutonium

An American scholar said North Korean officials told him they had “weaponized” enough for several nuclear bombs.