Backed by Saudi air power, Yemen’s coalition is trying to halt the Houthis’ advance. Al Jazeera defence editor Alex Gatopoulos explains why the war is so hard to stop—and the mounting cost for civilians caught in the middle. Subscribe to our channel Follow us on X: Find us on Facebook Check our website: Download AJE Mobile App : @AljazeeraEnglish #aljazeeraenglish #News #SaudiArabia #Yemen.