Associated Press
Boeing Commercial Airplanes Vice President and Chief Project Engineer Mike Sinnett poses with a model of newly designed 787's battery for photographers during a news conference in Tokyo, Friday, March 15, 2013. Boeing executives said commercial flights of its grounded 787 jets will resume "within weeks, not months" with a third of safety tests already completed. They said Friday they had not pinpointed the causes of the two battery problems that resulted in the global grounding of the technologically advanced Dreamliner planes. (AP Photo/Itsuo Inouye)

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