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Gasoline prices are displayed on a sign at a filling station in Oakland, Calif. Gas prices have been on a roller-coaster ride over the past decade, dropping to near $1 after President George W. Bush's first year in office, crossing the $2 mark in 2005 and reaching $4 in June 2008 before Congress and Mr. Bush took action, lifting presidential and congressionally imposed moratoriums on expanding offshore drilling on the Outer Continental Shelf. (Associated Press)

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