The United Nations estimates that some 215 million people live away from their native countries. Many try to escape unbearable conditions at home, attracted by Europe's wealth. But only a few manage to leave and make a new start abroad.John from Nigeria (name changed by the editors) never made it to Europe, despite several failed attempts. Now he's using those experiences to turn a profit. In a border town in northern Nigeria John offers help to would-be migrants. For him, migration has become a flourishing business.