Russian Prime Minister Vladimir Putin, right, and Rex Tillerson, ExxonMobil's chief executive smile during a signing ceremony in the Black Sea resort of Sochi, Russia, Tuesday, Aug. 30, 2011. Russia's state-owned Rosneft teamed up with U.S. company ExxonMobil on Tuesday to develop huge offshore oil fields in the Russian Arctic in return for access to resources in the Gulf of Mexico. (AP photo/RIA Novosti, Alexei Druzhinin, pool)

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