Waco: The Rules of Engagement - documentary about the events surrounding the 1993 FBI raid on the Branch Davidian headquarters in Waco, Texas.
Blimey. I think most folk have the idea in their head that the Davidian massacre was the mass suicide of a religious cult centred around a Jim Jones-style zealot, and I must admit that I started watching this thinking it would be the story of a lunatic and his indoctrinated sheep sacrificing themselves in the name of a mythic being. Not, as it turns out, the case at all. Much like the situation itself, the film's a slow build, but it gets quite horrific towards the end. David Koresh doesn't seem like he was someone you'd want babysitting your weans, but the film's narrative is about a militaristic and triumphalist government organisation failing to crack a fairly small nut with a steam-powered sledgehammer, before ensuring that their mistakes are literally buried. Really well worth a watch, so long as you don't mind feeling outraged and helpless.