HaRav Naftali Tzvi Yehuda Berlin (Netziv) was an Orthodox rabbi and the dean of the Volozhin yeshiva, at the time the largest institution of its kind, for nearly 40 years. He is the author of several works of rabbinic literature. Rabbi Elchanan Greenman studied Talmud and Codes for four years at Yeshivas Brisk of Chicago, where he also received his rabbinic ordination. He served as a faculty member at Yeshiva University of Los Angeles and has taught adult and young adult classes for more than 20 years in Chicago, Houston, and Los Angeles. He lives in Houston.""