UN envoy arrives in Yemen's capital to push Houthi rebels to implement peace deal

Convoy of the UN special envoy to Yemen Martin Griffiths leaves the Sanaa International Airport after the envoy arrives in Sanaa, Yemen, May 5, 2019. The UN Special Envoy to Yemen Martin Griffiths arrived in the capital Sanaa on Sunday, in attempt to push the Houthi rebels to implement a peace agreement last year. (Xinhua/Mohammed Mohammed)