Donald Trump has always traded on his image as a master dealmaker – but many deals have been done with North Korea before.
The astonishing sight of two Korean leaders crossing the border that divides them is just a first step.
A recent intervention by the US, the UK and France is only part of a far broader – and deadlier – campaign.
The Syrian conflict is a war of many sides. Here's a rundown of the key players.
The legal standards for military intervention are complicated and highly specific. It's not clear an attack on Syria would meet them.
Nothing the world has done has stopped Bashar al-Assad's regime from using chemical weapons – but it's imperative to keep trying.
After the US invasion brought their dictator down, Iraqis' everyday lives were marked by chaos and violence.
Reportedly passed over for secretary of state because of his moustache, John Bolton has made it into Donald Trump's administration at last.
Coalition forces are careful about how they report civilian deaths. And we think war is painless, as a result.
Thanks to South Korea, there is a chance for peace with North Korea. Whether the Trump administration can take it is another matter.
A year ago, productive north-south talks seemed inconceivable – but with the US tripping over its own feet, things are changing.
Donald Trump doesn't have one foreign policy – he has several, and they all clash.
Mounting evidence suggests we are so mesmerised by the theatre around Donald Trump that we have lost sight of how the US security establishment wields power.
As tensions between the US and Russia escalate, both sides are developing technological capabilities, including artificial intelligence that could be used in conflict.
The contestation of Asia will continue this year, with many countries facing internal and external battles.
Turkey's priorities in Syria just don't match the US's – and its increasingly authoritarian domestic politics don't help.
With a single cut in donations to a UN agency, Donald Trump has abandoned another norm of US foreign policy. The consequences could be disastrous.
An insight into Iranian media and public opinion in the aftermath of Donald Trump's speech decertifying the 2015 Iran Nuclear deal.
Without a strategy or a legal case to legitimate the use of force, the US is endangering crucial alliances and civilian lives.
The Chinese Communist Party has disciplined more than a million officials since Xi took power in 2012. What is going on?