Descendants of the Alter Rebbe, Rabbi Schneur Zalman of Liadi, gathered at the headquarters of the Chasidic movement he founded for a family reunion-of-sorts in honor of the day of passing, the 24th day of the Hebrew month of Teves. The conference in the Chabad-Lubavitch neighborhood of Crown Heights in Brooklyn, N.Y., examined the Alter Rebbe’s teachings and revealed stories about his life. ...