As Israel completed its fifth day of air strikes against Hamas targets in the Gaza Strip, Chabad-Lubavitch emissaries in Israeli cities terrorized by Palestinian-fired rockets counseled frightened residents and soldiers. In the coastal city of Ashkelon, not far from the Gazan border, Rabbi Menachem Lieberman and his staff handed out miniature books of Psalms to security forces and citizens who had gathered at the site where a rocket struck on Wednesday.