Major changes are needed at BP, Transocean and Halliburton following poor decisions in drilling the Macondo well in the Gulf of Mexico, said William Reilly, a co-chairman of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling. "Whatever else we learned and saw yesterday, it was emphatically not a culture of safety on that rig," Reilly said during the second day of the panel's hearings into the incident. "The problem here is that there was a culture that did not promote safety, and that culture failed," said former Sen. Bob Graham, the other commission co-chairman.

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