A visitor walks past a pumping jack on display in the outdoor exhibit area at the Bismarck Civic Center on May 22 during the 22nd Williston Basin Petroleum Conference oil expo in Bismarck, N.D.
A visitor walks past a pumping jack on display in the outdoor exhibit area at the Bismarck Civic Center on May 22 during the 22nd Williston Basin Petroleum Conference oil expo in Bismarck, N.D. AP
A visitor walks past a pumping jack on display in the outdoor exhibit area at the Bismarck Civic Center on May 22 during the 22nd Williston Basin Petroleum Conference oil expo in Bismarck, N.D. AP

Energy historian Daniel Yergin: Lift U.S. ban on oil exports

May 29, 2014 01:00 AM

UPDATED May 29, 2014 02:51 PM

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