Russian President Vladimir Putin was caught off guard by Armenia's suspending its membership of the Collective Security Treaty Organization (CSTO)‚ a crucial military alliance for Moscow. Armenian Prime Minister Nikol Pashinyan said during an interview with France 24 on Friday that Armenia would leave CSTO‚ viewed as Putin's response to the North Atlantic Treaty Organization (NATO)‚ a Western military alliance. CSTO is an alliance in which member nations pledge to support one another in the...