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A BP gas station logo sits beside a Moscow road sign in Moscow, Russia, on Wednesday, April 27, 2011. TNK-BP sees the loss of oil export tax breaks for its Verkhnechonsk field in eastern Siberia reducing net income this year by $450 million, said Chief Financial Officer Jonathan Muir. Photographer: Andrey Rudakov/Bloomberg via Getty Images

A BP gas station logo sits beside a Moscow road sign in Moscow, Russia, on Wednesday, April 27, 2011. TNK-BP sees the loss of oil export tax breaks for its Verkhnechonsk field in eastern Siberia reducing net income this year by $450 million, said Chief Financial Officer Jonathan Muir. Photographer: Andrey Rudakov/Bloomberg via Getty Images