FILE - In this file photo of Friday, July 17, 2009, an Iraqi worker operates valves at the Nahran Omar oil refinery near the city of Basra 550 kilomet

FILE - In this file photo of Friday, July 17, 2009, an Iraqi worker operates valves at the Nahran Omar oil refinery near the city of Basra 550 kilometers (340 miles) southeast of Baghdad, Iraq. A consortium grouping U.S. and European oil giants Exxon Mobil Corp. and Royal Dutch Shell PLC won the right to develop one of Iraq's most prized oil fields, Iraq's Oil Ministry spokesman said on Thursday Nov. 5, 2009, as the OPEC nation looks to revamp its battered energy sector. (AP Photo/Nabil al-Jourani, file)

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