FILE - In this April 21, 2010 file photo, the Deepwater Horizon oil rig burns in the Gulf of Mexico. A Halliburton employee who worked on a failed cement job linked to a 2010 deadly oil rig explosion ... more 
FILE - In this April 21, 2010 file photo, the Deepwater Horizon oil rig burns in the Gulf of Mexico. A Halliburton employee who worked on a failed cement job linked to a 2010 deadly oil rig explosion in the Gulf is testifying in a trial to determine what caused the blowout. Jesse Gagliano began testifying Tuesday, April 2, 2013, about his work for BP's cement contractor on the Deepwater Horizon. (AP Photo/Gerald Herbert, File) less 
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Associated Press | Photo By Gerald Herbert, File
Tue, Apr 2, 2013 11:11 AM EDT