The icebreaker that's key to Shell's plans to drill for oil in the Arctic is heading back north after authorities broke a dramatic blockade on Friday by environmentalists in Oregon. The environmental group Greenpeace claimed a moral victory in delaying the 380-foot icebreaker Fennica, which is carrying safety equipment required for Shell to fully explore its lease off northern Alaska. But the company said it started drilling Thursday night in anticipation of the ship's arrival. A squad of 13 Greenpeace activists who rappelled off Portland, Oregon's St. Johns Bridge bottled up the icebreaker in the Willamette River on Thursday morning. They hung about 100 feet off the surface with lines suspended between them that blocked the ship, Greenpeace climber Dan Cannon told VICE News. Read More?at ?www.news.vice.com