For six years, environmentalists and Native tribes have been trying to stop the Canadian company Enbridge from building a new oil pipeline through northern Minnesota. So far, Enbridge has been winning, with another recent victory this week in the Minnesota Court of Appeals.

Despite the blow, activists say a long summer of opposition to Line 3 is just heating up. Opponents continue chaining themselves to equipment and facing arrest in an effort to slow construction while Enbridge races to finish the project in the coming months.

This week, Reformer reporter Rilyn Eischens explains the history of Line 3 and the future of its replacement.