A gang of Arabs brutally attacked an American yeshiva student visiting with his family in Venice, Italy, in what local community leaders said was a rare instance of anti-Semitism. The student was knocked unconscious on Tuesday when he strolled late at night in the center of the city. A band of 15 Arab youth pounced on him, dragged him into a dark corner and pummeled him, using sharp weapons. The student lost consciousness, and the attackers fled when a passerby spotted them and called police and medics. The police are investigating, but have but have not caught the attackers. The...