Yemeni children fill buckets with water from a charity clean water tank in Sanaa, Yemen, on March 4, 2019. Trying to find a job or selling cheap products to secure the next meal is getting much harder in the besieged Yemeni capital Sanaa and other war-devastated cities, where more than 20 million Yemenis are on the brink of starvation as a fragile peace deal could spiral back to a full-scale war. (Xinhua/Mohamed al-Azaki)