Operators of the Deepwater Horizon rig, getting ready to move on to the next job, appeared to let their attention drift at a critical moment, hints the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling.
Senate Republicans have blocked subpoena power for President Obama's oil spill commission. The commission's chief counsel will push for it again, arguing it's needed to learn the truth about the Deepwater Horizon rig.
The presidential commission investigating the April 20 explosion of the Deepwater Horizon oil rig in the Gulf of Mexico cited a misread test as one likely cause of the disaster.
Halliburton may have been aware of problems with the cement used on the Deepwater Horizon before a major explosion that led to the worst oil spill in US history.