Ner Yitzhak, the official state ceremony that marks the anniversary of the assassination of Prime Minister Yitzhak Rabin, begins each year at the President's Residence with the lighting of a huge memorial candle, after which a service is held at Rabin's grave on Mount Herzl, followed by a special memorial session at the Knesset.Because this year is a milestone year since the incident, which occurred 30 years ago and drove a deep wedge between the Right and the Left, memorial events began or