There's considerable concern in many parts of the world as North Korea and the United States appear engaged in the highest-stakes game of chicken possible, one where the ultimate threat is nuclear war. Donald Trump threatened "fire and fury" - Pyongyang has now published details of exactly how it would shoot missiles towards the American Pacific island territory of Guam. So are Pyongyang and Washington serious? How far might these two nuclear armed nations be prepared to go?
Produced by Antonnette SMITH, Alessandro XENOS, Van MEGUERDITCHIAN.