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Oil spill investigators find critical problems in blowout preventer

A House energy panel investigation has found that the blowout preventer that failed to stop a huge oil spill in the Gulf of Mexico had a dead battery in its control pod, leaks in its hydraulic system, a "useless" test version of a key component and a cutting tool that wasn't strong enough to shea...

By Steven Mufson and David A. Fahrenthold

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