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.

Mexican nuclear official have said a stolen container of radioactive material has been found empty.

Saudi Arabia dislikes the deal the West has cut with Iran for two reasons.

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.

New Zealand missions to observe French nuclear tests were a global PR victory ... but the men who went see another side. Wayne Thompson reports.

Wayne O'Donnell was a stoker in the engine room of HMNZS Canterbury in August 1973 when it witnessed a nuclear test at Mururoa Atoll.

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.

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.

John Key finally got to chat with US President Barack Obama - the pair swapped....