Pipeline companies have a lot of enemies out there right now, mostly in the form of ordinary citizens and environmentalists who are wary of leaks. In this video, Fool.com contributor Aimee Duffy looks at Enbridge Energy Partners (EEP) and its most recent battle -- not with concerned citizens, but with another pipeline company -- over the presence of high levels of hydrogen sulfide in the crude oil being delivered to its rail loading facility in North Dakota.