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May 9th, 2010:

Methane Breached Faulty Seal, Caused Rig Blast, Professor Says

May 8 (Bloomberg) -- Bubbles of methane gas burst through a cement seal that was probably faulty, leading to the fatal explosion aboard the Deepwater Horizon rig and subsequent oil spill in the Gulf of Mexico, said a California professor who reviewed transcripts of interviews with blast witnesses.

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