A Yemeni child touches an art work at an art exhibition against war by Yemeni painters at the People's Development Foundation in the Yemeni capital of Sanaa on October 1, 2018. - About 24 Yemeni artists participated with more than 100 pieces of art work in an exhibition in Sanaa to attract attention to the ongoing war in Yemen which has killed nearly 10,000 people since 2015, most of them civilians, and triggered what the United Nations has described as the world's worst humanitarian crisis. (Photo by MOHAMMED HUWAIS / AFP)