NTSB Weeks Away From Finding Battery Failure Cause

NTSB Weeks Away From Finding Battery Failure Cause Play

Feb. 7 (Bloomberg) -- The top U.S. transportation safety investigator today questioned the adequacy of tests that prompted U.S. regulators to allow Boeing Co. to use lithium-ion batteries on the now-grounded 787 Dreamliner. Megan Hughes reports on Bloomberg Television's "Bottom Line." (Source: Bloomberg)

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