ASTANA, KAZAKHSTAN - MAY 04: Russian President Putin's special envoy to Syria Alexander Lavrentiev, Kazakh Foreign Minister Kairat Abdrakhmanov, UN Special Envoy for Syria Staffan de Mistura and Iranian deputy foreign minister Hossein Jaberi Ansari attend a signing of a memorandum to establish de-escalation zones in Syria during the fourth round of Syria peace talks in Astana, Kazakhstan on May 04, 2017.


 (Photo by Aliia Raimbekova/Anadolu Agency/Getty Images)