OAO Gazprom Pipes At Serbia's Halted South Stream Pipeline [Getty Images]

Russian state-run exporter OAO Gazprom branded end caps sit on sections of pipeline at the halted construction site for the South Stream gas project in Sajkas, Serbia, on Sunday, June 15, 2014. Russia's Foreign Minister Sergei Lavrov arrives in Serbia today for a 2-day visit. Photographer: Oliver Bunic/Bloomberg via Getty Images

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