Citizens of Belgium's capital Brussels haven been told to avoid crowded places like cafés, restaurants and theaters because of "precise information" about a planned terrorist attack. The city's metro has been shut down for the day. The steps were taken immediately after the Belgian government raised its terror alert to the highest possible level, implying that a terror attack is "imminent." The Belgian prime minister explained that the alert is a result of "quite precise information about the risk of an attack like the one that happened in Paris." A few days ago, the country raised its threat level to...