A Saudi soldier guards an aid plane at an air base in Marib, Yemen. A multi-million dollar agreement was signed between the refugee agency UNHCR and the King Salman Humanitarian Aid and Relief Centre in support of Yemen's internally displaced persons. Jon Gambrell / AP
A Saudi soldier guards an aid plane at an air base in Marib, Yemen. A multi-million dollar agreement was signed between the refugee agency UNHCR and the King Salman Humanitarian Aid and Relief Centre Show more
Saudi Arabia increases aid effort in Yemen
More than 20 million people in need of humanitarian assistance