Controversy, legal fights over Line 5 pipeline keep it in the news. We break the issues down.

Line 5 has become a household name in the Great Lakes region, creating intense concern over its potential risk to water quality and its infringement on tribal rights.

This weekend a documentary will open in select theaters nationwide highlighting the Bad River Band of Lake Superior Chippewa’s long history of activism and resistance as well as its ongoing legal battle with Enbridge Energy over the Line 5 oil pipeline. "Bad River" will show at AMC Mayfair Mall in Wauwatosa as well as in Madison, Ashland and Chicago.

Here, we break down what you need to know about its history, its controversies and its legal battles...