A convey of vehicles carrying members of a UN monitoring team leaves the Sanaa International Airport to their residence in Sanaa, Yemen, on Dec. 22, 2018. A United Nations six-member team to monitor a UN-brokered ceasefire in Yemen's Red Sea port city of Hodeidah arrived on Saturday in the rebel-held capital Sanaa, a Xinhua photographer in Sanaa airport witnessed. (Xinhua/Mohammed Mohammed)