 Belarus President Alexander Lukashenko greeted leaders of CSTO countries who arrived in Minsk on November 23 to attend Collective Security Treaty Organization Summit, taking part, are presidents of Russia, Kazakhstan, Kyrgyzstan and Tajikistan. Armenian Prime Minister Nikol Pashinyan failed to show up amid rumors that Yerevan was mulling idea of quitting CSTO, although Armenian flag adorned the venue alongside the flags of other member states, the leaders discussed the issues of collective and international security including formation of the joint air defense to protect the member states. Belarus is the current chair of CSTO and will hand over the presidency to Kazakhstan for the next year.