On 12 August, a Saudi-led airstrike on Yemen killed 51 people (including 40 children) and wounded 79. The next day hundreds of mourners gathered for a mass funeral for the schoolboys. By the caskets stood signs saying, ‘America killed the children of Yemen’. The procession, organised by Houthi rebels, was one of several taking place across Yemen. The US defence secretary is sending a three-star general to help the Saudi-led coalition to investigate the strike and see if there is anything that can be done to prevent this in the future. UNICEF said the strike was the worst attack on children since the war escalated in 2015. It is now the world’s worst humanitarian crisis, with 22 million people in desperate need of aid and protection.