US gives Shell clearance to begin Arctic drilling.

But only a quarter of the way to the potential reservoir it is targeting off Alaska, and they may not be able to continue without an extension to the allowed drilling season. FT: “Mr Salazar [Interior Secretary] said the company would not be allowed to go any further until it had secured final approvals for the Arctic Challenger, the 300-foot barge converted to carry a containment system for catching oil in the event of a spill. He suggested those approvals could come next week, at the earliest. “We are holding Shell’s feet to the fire,” Mr Salazar said. “We don’t know whether Shell will be able to complete a well in the Arctic this year”.”