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ASTANA, KAZAKHSTAN - MAY, 31 (RUSSIA OUT) (L-R) Armenian President Serge Sargsyan, Belarussian President Alexander Lukashenko, Kazakh President Nursultan Nazarbayev, Russian President Vladimir Putin, Kyrgyz President Almazbek Atambayev and Eurasian Economic Commission Chairman Tigran Sargsyan pose for a group photo during the Eurasian Economic Union Summit at Akorda Palace on May 31, 2016 in Astana, Kazakhstan. Heads of the Eurasian Economic Union (EAEU) member states Russia, Belarus, Armenia, Kazakhstan and Kyrgyzstan have gathered in Astana for the summit. President Putin will also hold talks with Kazakh President Nursultan Nazarbayev. (Photo by Mikhail Svetlov/Getty Images)

ASTANA, KAZAKHSTAN - MAY, 31  (RUSSIA OUT) (L-R) Armenian President Serge Sargsyan, Belarussian President Alexander Lukashenko, Kazakh President Nursultan Nazarbayev, Russian President Vladimir Putin, Kyrgyz President Almazbek Atambayev and Eurasian Economic Commission Chairman Tigran Sargsyan pose for a group photo during the Eurasian Economic Union Summit at Akorda Palace on May 31, 2016 in Astana, Kazakhstan. Heads of the Eurasian Economic Union (EAEU) member states Russia, Belarus, Armenia, Kazakhstan and Kyrgyzstan have gathered in Astana for the summit. President Putin will also hold talks with Kazakh President Nursultan Nazarbayev.   (Photo by Mikhail Svetlov/Getty Images)