AFP: BP sought to spread the blame for the Gulf of Mexico oil disaster Wednesday, setting off a battle of oil industry giants with tens of billions of dollars in potential fines and legal liabilities at stake. The British energy giant released a report concluding that a “sequence of failures” were to blame for the April 20 explosion that killed 11 people and unleashed 4.9 million barrels of oil in the worst-ever maritime spill. While admitting some mistakes, BP exonerated its well …