Well this is awkward. After months/years of protests targeting the Keystone XL pipeline from environmentalists worried about oil spills, TransCanada has now been forced to shut down the pipeline following...drum roll please...a 5,000 barrel oil spill in South Dakota. According to The Hill, the pipeline was taken offline at 6am this morning following a leak that was discovered about 35 miles south of a pumping station in Marshall County, South Dakota.