tensions explode on the streets of london. years of frustration boil over and lead to the worst rioting in a generation. tottenham, england. august 6th, 2011. >> we want justice! >> when do we want it? now. >> a crowd gathers outside a police station demanding answers about the shooting death of a man named mark duggan. >> the beginning of all this is the shooting of a young man in north london. his shooting by the police. protests as a result of that shooting. the protests then turning into something more violent. >> independent video journalist jason parkinson hears about the protest and races to the scene. >> i'd already spotted on twitter there was a lot of news feed coming out saying there's been a protest in tottenham about the shooting of mark duggan. and there's two police cars on fire outside the police station,