Montanans living along the Yellowstone River say they are worried and angry, following the rupture of an ExxonMobile pipeline which sent up to 1,000  barrels  of oil gushing into the river. The pipeline had been shut down once before, in May, after residents of the town of Laurel raised concerns over rising river levels.   For more on the situation in Montana, we speak with  Alexis Bonogofsky,  a rancher and tribal lands senior coordinator at the  National Wildlife Federation.