Iran's Minister of Petroleum Rostam Ghasemi talks to journalists as he arrives at a hotel for a meeting of the Organization of the Petroleum Exporting countries, OPEC, in Vienna, Austria, Tuesday, Dec. 11, 2012. (AP Photo/Ronald Zak)

Associated Press
Iran's Minister of Petroleum Rostam Ghasemi talks to journalists as he arrives at a hotel for a meeting of the Organization of the Petroleum Exporting countries, OPEC, in Vienna, Austria, Tuesday, Dec. 11, 2012. (AP Photo/Ronald Zak)
Iran's Minister of Petroleum Rostam Ghasemi talks to journalists as he arrives at a hotel for a meeting of the Organization of the Petroleum Exporting countries, OPEC, in Vienna, Austria, Tuesday, Dec. 11, 2012. (AP Photo/Ronald Zak)
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