BP is one of the largest energy companies in the world operating in over 80 countries with 16 refineries and 22,400 service stations. On April 20, 2010, there was an explosion on the Deepwater Horizon oil rig operated by BP that killed 11 people. Millions of liters of oil leaked from the damaged wellhead nearly 2 kilometers below the surface, resulting in one of the largest oil spills in history. BP has spent over $32 billion dealing with the cleanup and faces extensive damage claims, replacing their CEO, and investigations into the causes of the disaster and corporate responsibility. The spill devastated local economies and wildlife and highlighted the need for improved safety regulations for deep sea oil drilling.