This documentary, part of BBC2's Violence Season, looks at the high school, campus and workplace shootings which have cast a shadow over American society since the late Eighties. April 2009 was the 10th anniversary of the Columbine Massacre, but this unfortunate phenomenon is twice as old. By looking at five different shootings that have occurred over the last two decades, the film seeks to build up a picture of how and why this violence occurs. It also shows up the points of similarity between school and workplace rampages (unsurprisingly, in both instances, the perpetrators want to attack the institution as well as individuals). The film interviews with relatives of some of the victims of the violence as well as with relatives and friends of the perpetrators. It also contains an interview with Michael Carneal, who was only 14 years old when he killed three children and wounded five others, when he opened fire at a prayer group at Heath High School in West Paducah, Kentucky, in 1997. His raw and troubling story and stories of other shootings are placed in context by a series of interviews with academics, journalists and security experts who, between them, have spent a considerable time researching the subject.