The Keystone oil pipeline ruptured in North Dakota on Tuesday morning. The spill was contained to a field of crops. It was not immediately clear what caused the rupture or how much crude oil had spilled. Bill Suess said that an employee at the site near Fort Ransom, North Dakota Department of Environmental Quality, heard a "mechanical thud" and shut the pipeline down within … [Read more...] about Keystone Oil Pipeline Shut Down After Rupture in North Dakota