ISNA | Amir Kholousi: Diplomatic delegations from Iran and the remaining parties to the 2015 nuclear deal (Russia, China, Britain, France and Germany) gathered in Tehran on Thursday for an expert meeting. The gathering of experts, held at the Iranian Foreign Ministrys Institute for Political and International Studies, is the first session of the joint commission of the JCPOA parties in Iran ever since the nuclear agreement was struck in 2015.