BBC: It is being built at Golden Meadow, near Port Fourchon in southern Louisiana, by Wild Well Control, a company that specialises in controlling oil fires. A team of 25 people is working around the clock on the funnel, marine engineer Jason Holvey told the agency. In theory, the system should collect 85% of the oil rising from the sea floor. While the precise location of the leak is known, work will have to be carried out in the face of severe technical challenges, not …