Participants attend the opening session of the 15th International Energy Forum in Algiers on September 27, 2016. Oil prices rose modestly ahead of a meeting of producers from the Organization of the Petroleum Exporting Countries (OPEC) cartel and Russia in Algeria on September 28 that could agree to cap supplies. / AFP / Ryad Kramdi (Photo credit should read RYAD KRAMDI/AFP/Getty Images)
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