United Nations Special Envoy for Yemen Martin Griffiths (on the screen) briefs the Security Council on the situation in Yemen at the UN headquarters in New York, on July 28, 2020. The prolonged UN-brokered peace talks between the Yemeni government and the Houthi rebels might fail, UN Special Envoy for Yemen Martin Griffiths warned on Tuesday. (Eskinder Debebe/UN Photo/Handout via Xinhua)