Kathryn Bigelow: ‘The pervasiveness of racism in US has to stop’

A time when America was riven by racial violence, when civic abuse of the black community boiled over into riots, when the army was deployed to a city where the fires of rebellion burned in the streets. Not today, but Detroit in 1967. Fifty years later the Oscar-winning director Kathryn Bigelow has made a new film focusing on one event, when a jittery police force stormed a motel, terrorising the black teenagers they found.