CSTO Secretary-General Stanislav Zas, Armenian Prime Minister Nikol Pashinyan, Belarusian President Alexander Lukashenko, Russian President Vladimir Putin, Kazakh President Kassym-Jomart Tokayev and Tajik President Emomali Rahmon enter a hall during the Collective Security Treaty Organization (CSTO) summit of the member states leaders at the Kremlin in Moscow, Russia.