The US president is sending a message to Saudi Arabia. But it might also find that negotiations with Tehran are tougher.
Calls to keep talking are getting louder out of fear of escalation and ultimately war – but why are diplomatic relations so difficult for Nato and Russia?
A new nuclear plant called Barakah is nearing completion in the UAE. But it risks further stabilising the volatile Gulf region.
Iran's leaders are threatening to breach a 2015 agreement that froze their country's nuclear program. What is uranium enrichment, and what would it mean for Iran's ability to build nuclear weapons?
Though they were against climate action, the neocons showed that diplomacy can successfully be ignored when facing a huge threat.
North Korea is a major military threat to the US and its Asian allies, but exactly how powerful are its nuclear weapons? An earth scientist explains why it's hard to answer this question.
Bruce Willis saved the Earth with a nuclear weapon in the 1998 film Armageddon, but the law would need to change for him to do it now.
Exporting nuclear technology is lucrative, but without strict safeguards, buyers could divert it into bomb programs. Why is Saudi Arabia shopping for nuclear power, and should the US provide it?
Israel's prime minister failed to undermine the validity of Iran's nuclear deal, and instead ended up demonstrating just how important it is.
An insight into Iranian media and public opinion in the aftermath of Donald Trump's speech decertifying the 2015 Iran Nuclear deal.
Kim Jong Un's regime has already earned millions from the export of arms, missiles, drugs and endangered wildlife products.
The international community has been trying to stop North Korea from developing long-range missiles for decades. So what went wrong?
Nuclear power plants don't just pump out steady, carbon-free electricity; they also help produce the people the US needs for nuclear weapons inspections.
Kim Jong-il and Bill Clinton looked to have done a deal to curb North Korea's nuclear weapons programme for good. What went wrong?
The international community has been trying to stop North Korea from developing long-range missiles for decades. So how did North Korea get one?
Iran's economic recovery and reintegration into the global economy have become key electoral topics.
Talks begin today at the United Nations to negotiate a total ban of nuclear weapons. Over 3,600 scientists have signed an open letter supporting the ban.
Claims of the destructive powers of nuclear weapons have, for good reasons, been greatly exaggerated.
Donald Trump will soon have command of thousands of nuclear weapons. This presents a new and unknown threat to global security - and an urgent incentive for all states to ban nuclear weapons.
On September 27, 1956, an atomic mushroom cloud rose above the Maralinga plain - the first of seven British bomb tests. Why was Australia so keen to put UK military interests ahead of its own people?