There is so much talk in the news about TransCanada's (TRP -0.67%) Keystone XL pipeline that many investors overlook the fact that the company's biggest problem is actually a natural gas pipeline. But not for long. In this video, Motley Fool contributor Aimee Duffy takes a look at how bad things are for TransCanada, and what the company plans to do to bring success back to its most important asset.