Another three days and the fair city of Aalst will celebrate its world-famous carnival. Large crowds are expected for the parade of floats satirising people in the news. 300 carnival groups are taking part in the parade that covers a route 6 kilometres long. 900 police officers are being deployed to ensure security. A new emergency plan has been drawn up and a special team will be on hand to neutralise any drones that people with evil intent may decide to launch.