The office of French satirical magazine Charlie Hebdo  was firebomed early Wednesday, apparently in retaliation for publishing an issue "guest edited" by the Prophet Muhammad. The magazine, known for its  irreverence  and skewering of all cultural institutions, had published a special edition earlier in the day to "honor" the victory of the Islamist Ennahda party in Tunisian elections under the name "Charia Hebdo," a reference to Sharia Law. Hugh Schofield, correspondent for the BBC, reports on the latest.