A boy who was injured boy in a deadly attack on a market sits on the ground at a hospital in Helmand province, Monday, June 29, 2020. A car bombing and mortar shells fired at a busy market in southern Afghanistan's Helmand province on Monday killed over 20 people, including children, a statement from a provincial governor's office said. (AP Photo/Abdul Khaliq)

FILE - This Sunday, April 19, 2020 file photo, shows a large refugee camp on the Syrian side of the border with Turkey, near the town of Atma, in Idlib province, Syria. The head of the U.N. food agency warned of starvation and another wave of mass migration from Syria to Europe unless donors countries step up financial assistance to the war-ravaged country. (AP Photo/Ghaith Alsayed, File)

FILE - In this Oct. 1, 2018 file photo, children sit in front of moldy bread in their shelter, in Aslam, Hajjah, Yemen. The U.N. children’s agency says that millions of Yemeni children could be pushed to “the brink of starvation” as the coronavirus pandemic sweeps across the war-torn Arab country amid a huge drop in humanitarian aid funding. UNICEF on Friday, June 26, 2020 released a new report, “Yemen five years on: Children, conflict and COVID-19.” (AP Photo/Hani Mohammed, File)