Belarus officially joined the Shanghai Cooperation Organization (SCO) on Thursday, which was founded by Russia and China to deal with international security issues. Russian President Vladimir Putin, his Chinese counterpart Xi Jinping and other state leaders signed the documents admitting Belarus at the SCO summit in the Kazakh capital Astana. Kazakh President Kassym-Jomart Tokayev, who is chairing the SCO this year, congratulated Belarusian ruler Alexander Lukashenko, who is regarded as Europe’s last dictator. Putin held talks with several heads of state, including Xi, after his arrival in Ast…