A woman walks outside the TNK-BP headquarters in Moscow, Russia, Thursday, Oct. 18, 2012. Russia on Thursday downplayed concerns that Rosneft&#39;s possible purchase of BP&#39;s stake in the joint venture TNK-BP, which analysts say would reshape the country&#39;s oil industry and create the world&#39;s biggest oil and gas company, is likely to threaten competition. (AP Photo/Mikhail Metzel)
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