From the 1979 hostage crisis to strikes on Iran’s nuclear sites, US-Iran tensions have simmered for decades. But are Trump’s latest threats against the ayatollahs serious? Or will imminent talks in Muscat cool the discord?

Explainer 511: Why is Germany telling Syrians to return home?
07:12

Why has Israel invaded Lebanon?
33:29

Explainer 510: From Angola with love: are there Russian spies in southern Africa?
06:58