Guardian: BP said today it is a fortnight away from sealing the ruptured oil well in the Gulf of Mexico for good, as it revealed that the bill for containing and cleaning up the oil spill – the largest in American history – has reached $8bn. Depending on the weather, the oil giant hopes to seal the well for good in mid-September. Since 15 July, no new oil had flowed into the gulf from the ruptured well, BP said. It continues to search for oil on the surface. The bill has steadily risen …