Belgian prosecutors on Friday announced they were ending a 40-year investigation into an armed gang that terrorized the country in the 1980s and killed 28 people, including children, in a series of robberies and shooting sprees. The decision was announced at a press conference in Brussels, Belga news agency reports. Several of the attacks targeted supermarkets, but while the gunmen used extreme violence against bystanders, the goods they stole were often trivial by comparison, such as coffee and wine. They also attacked gun shops and higher-value targets. None of the attackers – known to the B…