The Story of the Earth Liberation Front

Director Marshall Curry discusses his documentary “If a Tree Falls: The Story of the Earth Liberation Front,” which tells of the rise and fall of an anarchist environmental group, the ELF. The film focuses on the evolution of the group and the transformation and radicalization of Daniel McGowan, one of its members, and poses questions about environmentalism, activism, and the way we define terrorism. “If a Tree Falls” opens June 22 at IFC Center.