ISTANBUL   Eurasian leaders on Friday signed a document on creating an expanded format of the Commonwealth of Independent States (CIS) during a summit in the Tajik capital Dushanbe. According to a Kremlin statement, a total of 19 documents were signed following a meeting of the CIS Heads of State Council in Dushanbe, including decisions on establishing a “CIS Plus” format, and giving the Shanghai Cooperation Organization (SCO) observer status within the organization. The Russia-led CIS is a