In the piney woods of East Texas, a group of environmentalists took on the U.S. government and Big Oil starting in 2012. It remains to be seen whether Tar Sands Blockade will succeed in holding back TransCanada’s Keystone XL South pipeline.

A documentary about their struggle is the subject of the June installment of the Unitarian Univeralist Church of Oak Cliff’s social justice film series.

Catch “Blockadia Rising: Voices of the Tar Sands Blockade” at 3 p.m. Tuesday, June 3. The film, at the church on Kiest, starts at 7 p.m. and is free.