The November 13 attacks in Paris unleashed an unprecedented storm of rumour and speculation on social media, surpassing the tidal wave that accompanied the Charlie Hebdo assaults in and around the French capital in January, writes Gregoire Lemarchand, the head of AFP's social media unit. This time around, the late hour of the strikes and the fact that they occurred almost simultaneously in several locations helped feed the rumor mill. But at the same time, there was less irresponsible content and less conspiracy theories than ten months earlier. It was as if lessons had been learned.