Russia's president was snubbed three times by his supposed ally on Thursday when he met with some of his country's closest partners at an international summit. Vladimir Putin met with leaders from the Collective Security Treaty Organization (CSTO), a Russian-dominated alliance of post-Soviet nations. But the supposedly friendly forum proved hard going for Putin, who was slighted multiple times by the prime minister of Armenia in protest at its ongoing conflict with Azerbaijan. Nikol Pashinyan used his speech at the start of the summit — held in Yerevan, Armenia's capital — to criticize the effectiveness of the alliance, where Russia...