As France marks 10 years since the terror attack on the satirical newspaper Charlie Hebdo, we speak to journalist and filmmaker Paul Moreira, who witnessed the immediate aftermath of the massacre. Moreira's production company had offices next door to those of Charlie Hebdo, and upon arriving at the building on January 7, 2015, he compared the scene to a war zone that he had witnessed in Iraq. Later, in a bid to better understand what goes on in the minds of jihadists more generally, he produced a documentary entitled "ISIS: Birth of a Monster". It also focused on recruitment methods used by the Islamic State group. "I wanted to expose the tricks and the lies and the way they were manipulating young kids," Moreira tells us.