How did the civil war in Yemen become a conflict with global consequences? From attacks on key shipping routes to the rivalry between Iran and Saudi Arabia, we explain how events in Yemen came to affect trade, oil prices and food supplies around the world. Subscribe to our channel here: https://bbc.in/bbcnews For the latest news download the BBC News app or visit BBC.com/news #BBCNews #Yemen #Houthis #Iran #SaudiArabia