nuclear weapon

US scientist: North Korea could have 20 nuclear bombs this year

North Korea could have enough plutonium and highly enriched uranium by the end of 2016 to build up to 20 nuclear bombs, a leading US nuclear scientist says.

North Korea says it has developed ballistic nuclear warheads

North Korea has developed the technology to fit a nuclear warhead on a missile, leader Kim Yong Un was quoted as saying by state media Wednesday.

North Korean leader orders nuclear weapons readiness

North Korea's nuclear weapons should be ready for use at "any moment," leader Kim Jong Un said, according to state media on Friday.

Iran, US announce prisoner swap as they prepare nuclear deal launch

Long-time foes Iran and the United States agreed to swap a total of 11 prisoners, both sides announced Saturday as they held last-minute negotiations on implementing an international nuclear deal that will remove sanctions against Iran.

Kerry heads to Vienna to talk nuclear deal with Iran, EU counterparts

US Secretary of State John Kerry will travel to Vienna Saturday to consult with Iranian Foreign Minister Mohammad Javad Zarif and European Union foreign policy chief Federica Mogherini to consult on the Iran nuclear deal, Kerry's spokesman announced late Friday.

How important is North Korea's latest nuclear test?

North Korean leader Kim Jong Un has led his country into further controversy by claiming to have carried out a fresh nuclear test.

UN Security Council vows action against North Korea for atomic test

The UN Security Council pledged to take "significant measures" against North Korea after the reclusive regime said Wednesday it had successfully conducted a test on its first hydrogen bomb.

North Korea chooses confrontation in conflict over nuclear programme

The sanctions imposed on North Korea have never been able to halt Pyongyang's nuclear or missile tests. Once again the isolated dictatorship has demonstrated its firm intention of becoming a nuclear power.

NATO chief slams North Korea nuclear test, "inflammatory" rhetoric

NATO Secretary General Jens Stoltenberg criticizes Noth Korea's announced nuclear test, saying it "undermines regional and international security" and is in "clear breach" of UN Security Council resolutions.

Worldwide anger over North Korean nuclear test

North Korea said Wednesday it had successfully conducted a fourth nuclear bomb test, leading to fury from its regional neighbours and condemnation from around the world.

EU: Nuclear test is "grave violation" of North Korea's obligations

EU foreign policy chief Federica Mogherini condemns North Korea's alleged hydrogen bomb test as a "grave violation" of the country's nuclear obligations, and calls it a "threat to the peace and security" of North East Asia.

The H-bomb: the most destructive weapon on earth

The first hydrogen bomb, tested in November 1952 by the United States, yielded energy equivalent to 10 megatons of TNT - roughly 1,000 times larger than the atomic bomb dropped on Hiroshima seven years earlier.