Yemeni children stand amid rubbish at a slum in the capital Sanaa, on March 12, 2016.
Saudi Arabia and several of its Sunni Arab allies launched air strikes on March 26 last year after the Huthis, a Shiite group from Yemen's north, seized control of large parts of the country including the capital Sanaa.
The United Nations says more than 80 percent of the population is in dire need of food, medicine and other basic necessities and the crisis ranks as a "Level 3 emergency", the most serious in the UN system. / AFP / MOHAMMED HUWAIS        (Photo credit should read MOHAMMED HUWAIS/AFP/Getty Images)