AdvertisementFrench Prisons Prove To Be Effective Incubators For Islamic ExtremismJanuary 22, 2015Dina Temple-RastonfacebookEmailCherif Kouachi, one of the brothers responsible for the Charlie Hebdo attacks, spent 20 months in Fleury-Merogis prison just outside Paris, where he crossed paths with a radical imam with ties to Osama bin Laden.This photo shows the men's building in May 2014. (Reuters/Landov)