Christoph Heusgen (2nd L), permanent representative of Germany to the United Nations and president of the UN Security Council for April, resets the hourglass as he chairs a meeting of the UN Security Council on the situation in Yemen at the UN headquarters in New York, April 15, 2019. (Photos: Xinhua)

Virginia Gamba , United Nations secretary-general's special representative for children and armed conflict, attends a meeting of the UN Security Council on the situation in Yemen at the UN headquarters in New York, April 15, 2019.

The United Nations Security Council holds a meeting on the situation in Yemen at the UN headquarters in New York April 15, 2019.

Virginia Gamba, United Nations secretary-general's special representative for children and armed conflict, briefs the UN Security Council on the situation in Yemen at the UN headquarters in New York, April 15, 2019.