Nuclear Security Summit: Barack Obama says expanded treaty will help foil Isis 'madmen' despite Putin snub
The US President said 102 nations have expanded the Convention on the Physical Protection of Nuclear Material.
Nuclear terror attacks should not be ruled out, warns atomic energy agency head
World has seen a 'big achievement' in barring nuclear terrorism but threat remains, says IAEA director general.
Rattled Japan blasts Trump's call to arm itself with nuclear weapons to replace US military presence.
It is impossible for Japan to arm itself with nuclear weapons says foreign minister.
UK and US to simulate cyberattack on nuclear facility to test resilience
Government sources claim exercise part of prudent planning rather than prompted by imminent threat.
Hiroshima atomic bomb survivor wants Barack Obama to tour city during Japan visit in May
If Barack Obama visits Hiroshima and Nagasaki, he will become the first sitting US president to do so.
North Korea's secret underground nuclear explosions sniffed out by radioactive gas
A device that finds the 'smoking gun' of nuclear tests has been developed.
Pakistan rules out selling nuclear technology to Saudi Arabia
Islamabad clarifies that its nuclear weapons are for domestic purposes and for deterrence.
20 workers at Faslane nuclear base exposed to radiation after safety breach on Trident submarine
Workers exposed to ionising radiation while repairing leaking tank onTrident nuclear weapons submarine.
UN approves tighter sanctions for North Korea that 'increase regime's isolation'
The decision comes two months after the country claimed it carried out a successful hydrogen bomb test.
Stop Trident London rally: Nuclear weapons submarines detectable by super-fast 'underwater drones'
CND's general secretary Kate Hudson believes the UK could opt to move away from nuclear weapons possession.
Stop Trident rally: People have died from cuts, but we can afford £183bn on nuclear weapons?
By the government's own evaluation, Trident does nothing to meet our current security threats.
Labour Trident row: 10,000 sign up for CND rally where Corbyn and Sturgeon will speak
Labour leader's attendance at the 27 February London demonstration has enraged his own MPs.
Labour Trident row: Tom Watson urges David Cameron to hold vote on nuclear deterrent
Labour's internal row over the future of the UK's nuclear deterrent system has reignited.
North Korea calls South Korea's President Park Geun-hye a 'tailless crazy old bitch'
South Korea urged North Korea to stop its 'vulgar' personal attacks on the president.
Iraq hunts 'highly dangerous' stolen radioactive material amid 'dirty bomb' fears
Officials are alarmed at the prospect of a dirty bomb if Isis gets its hands on the material.
North Korea has 'restarted plutonium reactor' which could be used for nuclear weapons
Enriching uranium at the Yongbyon facility could be a precursor to developing nuclear weapons, US says.
Corbyn needs to toughen up on national security or Labour will never win an election
Britons are patriotic and see defence as a top priority for the protection of our country.
Scientists agree World 'Doomsday Clock' should remain at 3 minutes to midnight
The Bulletin of the Atomic Scientists has been monitoring how close we are to destroying ourselves since 1947
Doomsday Clock: Watch announcement of how close Earth is to catastrophe live online
Bulletin of the Atomic Scientists to announce how close we are to the apocalypse with its Doomsday Clock.
Nuclear weapons could be used to blow up asteroids if they threaten the Earth, scientists reveal
A nuclear blast would cause an asteroid to lose mass and change its direction of travel
Jeremy Corbyn: Labour leader says Trident submarines could be retained as a non-nuclear fleet
Corbyn said his 'first priority' is to protect defence jobs while also dismantling Britain's nuclear capabilities.
Genocide Memorial Day 2016: Nuclear weapons are 'an existential threat to humanity'
Events around the world are focusing on the threat that WMDs, particularly nuclear missiles, pose to mankind.
Nuclear power plants in 20 countries 'do not have any protection' against cyberattacks
Nuclear Threat Initiative says many countries with nuclear facilities have poor protection for cyberattacks.
North Korea: Pyongyang claims it is ready to detonate H-Bomb capable of 'wiping out' US
The isolated nation said that their 'successful' testing last week was in response to US hostility.
Cold War-era document reveals US plans to nuke 1,200 cities
Declassified file shows US planned to use bombs far more powerful than the one it dropped on Hiroshima.
Want a world without the threat of nuclear weapons? We must ban nuclear testing
Eight countries – including China and the US – have still not signed and ratified the Comprehensive Nuclear Test Ban Treaty.
North Korea hydrogen bomb: Kim Jong-un boasts of expanding nuclear arsenal
Kim Jong-un claims his country has developed hydrogen bombs for its nuclear arsenal.
Threatening nuclear weapons in Syria is Putin's attempt to get Russia treated like a superpower again
Confusion over how to beat Isis gives Putin an opportunity to seem proactive and powerful.
War on Isis: Vladimir Putin raises spectre of nuclear weapons as Russia targets Daesh in Syria
Putin has remarked that cruise missiles targeting jihadists could be fitted with nuclear warheads.
North Korea test site activity could be a bluff
Satellite images showed construction of a test tunnel where country conducted three previous nuclear tests.