Russian Prime Minister Dmitry Medvedev, left, and Vietnamese Prime Minister Nguyen Tan Dung shake hands after signing a free trade agreement between the Eurasian Economic Union and Vietnam in Burabay,... more 
Russian Prime Minister Dmitry Medvedev, left, and Vietnamese Prime Minister Nguyen Tan Dung shake hands after signing a free trade agreement between the Eurasian Economic Union and Vietnam in Burabay, Kazakhstan, Friday, May 29, 2015. (Yekaterina Shtukina/RIA-Novosti, Government Pool Photo via AP) less 
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Associated Press
Fri, May 29, 2015 1:51 PM EDT