PARIS: The images of France’s riots posted and broadcast around the world have cast a pall on the country’s important tourism sector, with many fearing worse consequences if violence returns. “The surge of violence in the centers of Nice, Paris, Lyon — it’s catastrophic,” said Christelle Cassagne, head of the ADN Tourisme body covering the country’s tourism institutions. “When you book a hotel for a week, it’s not so you stay stuck in the hotel,” she said. The scenes of clashes with police,