A crowd of tens of thousands is expected to take part in tonight\'s mass demonstration in downtown Jerusalem demanding a firmer hand in the war against Palestinian terrorism. The theme of the event: \"Expel Arafat! Fight Terrorism!\" The rally will be held in memory of a man who was to be one of its main speakers, the assassinated Minister of Tourism, Rehavam Ze\'evi. Hundreds of policemen will guard the rally, and traffic in the city center will be stopped starting in the afternoon hours.