CBS: The Keystone XL pipeline is a massive, controversial oil delivery project cutting through America's heartland. The company behind the project says, if it's completed, it could help reduce America's dependency on foreign oil.
That pipeline would carry oil from Canada to refineries on the Gulf of Mexico. The northern part has not been approved, but the southern stretch is already under construction - except where a few Texas ranchers are standing in the way.
The Keystone XL Pipeline extends two...