British Petroleum is suing Transocean for at least $40 billion in damages.  BP claims the worst offshore oil spill in U.S. history was caused by the failure of every safety system on the Deepwater Horizon rig.

BP is also suing Cameron International, claiming they provided a faulty blowout preventer.

Transocean, and Cameron International are suing BP, saying British Petroleum caused the problems, by making decisions based on cost savings, not safety.

Transocean is also suing Cameron International, and Halliburton, as well.