It did not perform 72 of them, mostly for a simple reason: at the time, the Deepwater Horizon was operating in the Gulf of Mexico, and the blowout preventer was on the seafloor and therefore ...

Eleven people were killed and 17 people were injured in an explosion on the Deepwater Horizon on 20 April ... for the safety valve known as the blowout preventer. The report says six leaks ...