The war in Yemen has killed more than 10,000 civilians but this number may soon be dwarfed by the numbers starving to death. Yemen is experiencing a humanitarian catastrophe, which the warring parties are making worse and which the outside world seems unwilling or unable to tackle. Stephen Sackur talks to the UN humanitarian co-ordinator in the country Jamie McGoldrick. Is he losing the struggle to save millions of lives?(Photo: Jamie McGoldrick on Hardtalk)