For many in this country, it's no laughing matter. An appeals court has upheld a government-backed ban on French satirist Dieudonné's one-man show, on what was to be the opening night of a national tour. This decision overrules a lower court ruling in the western city of Nantes earlier the same day. Critics call Dieudonné's show blatantly anti-Semitic. But where exactly does the line between free speech and hate speech lie?