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Cementing Becomes One Focus In Gulf Oil Probe

03:53
The Deepwater Horizon oil rig is seen burning on April 21 in the Gulf of Mexico. Federal investigators have turned their attention to the cementing process that occurred on the oil rig before the explosion. (AP)
The Deepwater Horizon oil rig is seen burning on April 21 in the Gulf of Mexico. Federal investigators have turned their attention to the cementing process that occurred on the oil rig before the explosion. (AP)

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