Kazakh president Nursultan Nazarbayev (from left to right), Kyrgyz president Roza Otunbayeva, Tajik president Emomalii Rahmon, Russian president Dmitry, Medvedev, Armenian president Serzh Sargsyan and Secretary general of CSTO Nikolai Bordyuzha at informal meeting of heads of Collective Security Treaty Organization member states (CSTO). August 20, 2010.
