Keystone pipeline shut down after oil leak in rural North Dakota - PBS

1. Keystone pipeline shut down after oil leak in rural North Dakota  PBS
2. Oil Spill in North Dakota Prompts Shutdown of Keystone Pipeline  The New York Times
3. Keystone oil pipeline shutdown could quickly lead to higher gasoline prices  AP News
4. Keystone oil pipeline shut down after "mechanical bang" reported  CBS News
5. The latest leak in the Keystone oil pipeline continues its troubled history  ABC News