Afghan displaced children sit on a mud wall at a displaced person camp in the southern part of Mazar-i-Sharif, capital of northern Balkh province, Afghanistan on April 20, 2018. Water scarcity emanated from lack of precipitation in late 2017 and early this year has affected the live of 500,000 children in Afghanistan, the UNICEF warned Tuesday. (Xinhua/Rahmat Alizadah)