The G20 summit in London will take place in a different universe from Charleroi, a Belgian city in the heart of Europe but cast into the economic wilderness for decades. Once at the centre of Belgium's "pays noir" coal and industry belt, Charleroi, is surrounded by a post-industrial landscape of slagheaps and derelict factories. It faces the latest global recession having never recovered from the last two. The city in the Walloon, French-speaking region of southern Belgium is openly acknowledged by many of its inhabitants to be the most depressing place in Europe. In recent times, Charleroi, whose people are...