Professor Jean Pierre Tourtier, Chief Medic of the Paris Fire Brigade, had never spoken in public about the aftermath of the massacre at Charlie Hebdo. His precise descriptions of what he saw had a barely-suppressed intensity that took me by surprise: "The first thing I remember, even before I entered the Charlie Hebdo office - was the smell. A smell that was a mix of gunpowder and blood - that metallic smell of blood. Then I saw a pile of bodies. And someone at the back of the meeting room said - in a voice that was almost gentle - 'Monsieur, s'il vous plaît, aidez-moi'."