UN envoy arrives in Yemen's capital to accompany Houthi rebel delegation to Sweden

United Nations Envoy to Yemen Martin Griffiths (2nd, L) arrives at the Sanaa International Airport in Sanaa, capital of Yemen, on Dec. 3, 2018. Martin Griffiths arrived in Yemen's rebel-held capital Sanaa on Monday, in a brief stop to get Houthi delegates to Sweden. (Xinhua/Mohammed Mohammed)