Barack and Michelle Obama's fairytale love story of an adoring couple propelled on to the international stage has caught the imagination of millions. Their regular Friday "date nights" make the television news, and there was a stir recently when they caught Air Force One for a night at the theatre in Manhattan. This weekend, in the aftermath of the D-Day celebrations, they are in Paris with their young daughters - having turned down an invitation for dinner with President Nicolas Sarkozy and his wife Carla in favour of a more intimate family event. But it was not always wedded bliss...