The Weather Underground is a 2002 documentary film based on the rise and fall of the American radical organization The Weathermen. The group's goal was to "bring the (Vietnam) War home" through acts of militant tactics.
Really good movie about a radical group trying to enact change in the government threw any means necessary. They never killed anyone that im aware of. I think some of them blew them selves up by accident. If you liked V for vendetta its that kind of craziness only real people.