Until now, the Brexit had mostly been a succession of public statements, declarations of intent, veiled threats and wishful thinking. But today, the British government made the United Kingdom's departure from the European Union manifest by officially invoking Article 50 of the EU treaty and delivering formal notification of its departure from the Continental bloc, the first member ever to do so. This started the clock on negotiations over the terms of the divorce and their future relationship, which will leave both the United Kingdom and European Union considerably changed....