UN Special Envoy of the Secretary-General for Syria Staffan de Mistura attends a round of negotiation...
UN Special Envoy of the Secretary-General for Syria Staffan de Mistura, left, attends a round of negotiation with Syria's main opposition High Negotiations Committee (HNC) leader Nasr al-Hariri (not pictured), during the Intra Syria talks, at the European headquarters of the United Nations in Geneva, Switzerland, Friday, March 3, 2017. REUTERS/Salvatore Di Nolfi/Pool