A Saudi soldier stands guard before aid supplies are unloaded from a Saudi air force cargo plane at an airfield in Yemen's central province of Marib, on March 12, 2018. Saudi Arabia and its allies launched a military intervention in Yemen in 2015 with the aim of rolling back Huthi rebels who had seized the capital and restoring the government to power. / AFP PHOTO / ABDULLAH AL-QADRY (Photo credit should read ABDULLAH AL-QADRY/AFP/Getty Images)
