Associated Press: In an internal report released Wednesday, BP blames itself, other companies’ workers and a complex series of failures for the massive Gulf of Mexico oil spill and the drilling rig explosion that preceded it. The 193-page report was posted on the company’s website even though investigators have not yet begun to fully analyze a key piece of equipment, the blowout preventer, that should have cut off the flow of oil from the ruptured well but did not. That means BP’s report is far …