Russian President Vladimir Putin has hosted a summit of former Soviet republics and called for unity among them. Putin presided over an informal summit of the Commonwealth of Independent States in St. Petersburg on Tuesday. Russia is expected to chair the group next year. -snip- One of the participants was Armenian Prime Minister Nikol Pashinyan. He is believed to have been frustrated with Russia since ethnic Armenian forces were forced to surrender in the disputed region of Nagorno-Karabakh following a military offensive by Azerbaijan in September. Pashinyan apparently believes that Moscow failed to fulfill its role as Armenia's ally. He...