For three days, they spread fear and horror across France, killing 17 people before being shot dead by police. Their rampage began with an attack on satirical weekly Charlie Hebdo and ended with a deadly hostage crisis at a Jewish supermarket in eastern Paris. Who were the Kouachi brothers and Amedy Coulibaly?
The three terrorists were known to the police and had prior convictions. From wasted youth to radical violence, FRANCE 24 investigates the path that led these three young men to acts of terrorism.
Check out our interactive graphic: "Tracing shadowy terrorist links"