Brexit a tragedy and EU partly to blame: Juncker

European Commission President Jean-Claude Juncker on Friday described Brexit as a "tragedy" that had happened partly as a result of the European Union's past mistakes.In a speech in Florence, the head of the EU's executive arm warned of tough negotiations to come but also struck a more conciliatory tone after the first round of contacts on a Brexit deal degenerated into a cross-Channel war of words."Our British friends have decided to leave, which is a tragedy," the former Luxembourg Prime Minis