President Dmitry Medvedev (fourth right) attending a joint photocall after the Collective Security Treaty Organization summit in a narrow format, December 20, 2011. From left: Presidents Serge Sargsyan of Armenia, Alexander Lukashenko of Belarus, Nursultan Nazarbayev of Kazakhstan, and Almazbek Atambayev of Kyrgystan. From right: Nikolai Bordyuzha, Secretary-General of the Collective Security Treaty Organization, Islam Karimov, President of Uzbekistan, and Emomali Rakhmon, President of Tadjikistan.