The world's largest nuclear meeting, the five-yearly Review Conference of the nuclear Non-Proliferation Treaty (NPT), has just closed at the United Nations headquarters in New York.

This month North Korea claimed to have launched a ballistic missile from a submerged submarine.

One of the biggest deals of the decade has just been concluded. Alexander Gillespie discusses Iran's nuclear concessions.

Pakistan has test-fired a ballistic missile able to carry a nuclear warhead to every part of India. Yesterday's test was another escalation in Islamabad's effort to keep pace with its neighbouring rival's formidable military advancements.

Veterans of British nuclear tests in the mid-Pacific in the 1950s, including New Zealand servicemen, have taken heart from a first victory in their long fight for compensation for illnesses linked to radioactive fallout.

US Secretary of State John Kerry says he knows New Zealand stands with America on Iraq - and he doesn’t need to ask to know that.

US Secretary of State John Kerry used a reception at the NZ embassy in Washington last night to pointedly promote US nuclear-powered warships as safe.

The US nuclear test at Bikini Atoll in the Marshall Islands on March 1, 1954, was 1000 times larger than the bombs that obliterated Hiroshima and Nagasaki.

Serving world leaders their lunch is a serious affair. No room for "blondes" or women in dresses then, it appears.

Responding to his critics, President Barack Obama forcefully defended the nuclear agreement with Iran, declaring that the United States "cannot close the door on diplomacy."

Editorial: Viewed against a background of the long-standing enmity between Iran and the West, the nuclear deal signed with Tehran is a stunning achievement.

New Zealand has welcomed the agreement reached in Geneva yesterday aimed at capping Iran's nuclear programme.

Iran has struck a historic nuclear deal with the US and five other world powers, after more than three decades of estrangement,

Made a mistake at work? It can't be worse than this. Twice this year, US officers entrusted with launch keys to nuclear missiles have been caught leaving open a blast door.

Britain and Iran are to take a first step towards re-opening their respective embassies, Foreign Secretary William Hague says, adding that Tehran's new leadership is presenting itself "in a much more positive way than in the recent past."

Navy ex-servicemen suffering ill health from the fallout of French nuclear testing at Mururoa are calling for a special remembrance day.

Fred Towler was keen to go. He was 23 and his ship had government orders to steam 4300km from Auckland to patrol off Mururoa Atoll in French Polynesia.

Data from nuclear bomb testing helped New Zealand scientists pinpoint the age of a skeleton found in Australia, leading to a decades-old cold case being reopened.

Only two years after being elected, Prime Minister David Lange told Margaret Thatcher over lunch that he would be willing to resign if it would help to get a solution to the Anzus crisis.

ESR scientists are monitoring the Pacific for airborne radioactivity resulting from yesterday's underground nuclear test in North Korea.

Nuclear weapons and the United States alliance were causing Australia more than its share of grief in 1985, Cabinet documents by the National Archives of Australia reveal.