Twenty years ago, a tragic event changed the direction of my life. Three teenagers from the banlieue of Clichy-sous-Bois, north of Paris, were returning from a football game one afternoon in late October 2005 when they were chased by police. Zyed Benna, Bouna Traore and Muhittin Altun had done nothing wrong (an inquiry later confirmed this) but were so disoriented by fear of the police, they hid in an electricity substation.