It has been a strange week in Munich; a week of deceptively cool mornings, afternoons hot enough to fry eggs and thunderstorms at twilight that have turned streets into streams. A week of reflection, too, capped last Sunday by a service of remembrance in the cathedral, attended by Chancellor Merkel, to honour the nine young lives taken in the shooting at the shopping centre which sent a tremor through Freistaat Bayern, and through the nation.