Russian President Medvedev attends the Collective Security Treaty Organisation member states an informal summit

(L-R): Belarusian President Alexander Lukashenko, Russian President Dmitry Medvedev, Kazakh President Nursultan Nazarbayev, Armenian President Serzh Sargsyan, Tajik President Emomali Rakhmon, and Uzbek Prime Minister Shavkat Mirziyeyev attending an informal summit of Collective Security Treaty Organization member states' leaders at the Gorki residence outside Moscow on May 8, 2010. (UPI Photo/Alex Volgin)