September 29, 2014. From left: President of Turkmenistan Gurbanguly Berdymukhamedov, Iranian President Hassan Rouhani, Russian President Vladimir Putin and President of Kazakhstan Nursultan Nazarbayev, right, at the ceremony to release young sturgeon fish on the Volga River Embankment during a walk by heads of state of the 4th Caspian Summit member countries in Astrakhan.