Revealed: how the FBI targeted environmental activists in domestic terror investigations

Protesters were characterized as a threat to national security in what one calls an attempt to criminalize their actions

Helen Yost, a 62-year-old environmental educator, has been a committed activist for nearly a decade. She says she spends 60 to 80 hours a week as a community organizer for Wild Idaho Rising Tide; to save money, she lives in an RV. She's been arrested twice for engaging in non-violent civil disobedience.

Yost may not fit the profile of a domestic terrorist, but in 2014 the FBI classified her as a potential threat to national security. According to hundreds of pages of FBI files obtained by the Guardian through a Freedom of Information Act (Foia) lawsuit, and interviews with activists, Yost and more than a dozen other people campaigning against fossil fuel extraction in North America have been identified in domestic terrorism-related investigations.