We don't know whether they were negligent. There's certainly a prima facie case of negligence against Transocean and Halliburton but the case against BP seems pretty weak. The management team at BP is not the same now as when the Texas City refinery blew up in 2005 so no real conclusions can be drawn from that incident. Overall you seem to have been reading too many biased US sources - you need to break away and try to get a more balanced view in my opinion - here's what Eddie Izzard <--- thinks, for example.
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