Tanakh Study Day 2014: Tum'a: Metaphysical Polution or Halachic Construct, by Rav Daniel Wolf. This shiur was dedicated in memory of Mr. Abe M. Shamah z"l, a man who lived by the principle of Torah im Derekh Eretz, a successful businessman who always made time to learn Torah, by Steven and Naomi Esses and family.