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Published October 28, 2010, 12:00 AM

Deepwater Horizon explosion


In this April 21, 2010 file aerial photo taken in the Gulf of Mexico more than 50 miles southeast of Venice, La., the Deepwater Horizon oil rig is seen burning. Tests performed before the deadly blowout of BP's oil well in the Gulf of Mexico should have raised doubts about the cement used to seal the well, but the company and its cementing contractor used it anyway, U.S. investigators with the president's oil spill commission said today. (AP Photo/Gerald Herbert, File)
Read the article: Tests warned of cement troubles before BP blowout