Screamers (2007)

Instead of opening a concert with ''Hello, Boston!'' or some other cozy rock bona fides, Serj Tankian, the lead singer of System of a Down, offers the slightly loftier ''It's time to make the Turkish government pay for their f---ing crime!'' He's referring to the Armenian genocide of 1915, a calamity Turkish officials deny to this day. System of a Down, whose members are the grandsons of genocide survivors, anchor this musical and political documentary with surprising gravitas, and the film offers true insight into the patterns of war crimes, even if the songs sound disquietingly close to a call to violence.