Historic Treasures by Rabbi Sholom Ber Schapiro: The demanding letter a chossid sent to 770 Eastern Parkway after the passing of the Rebbe Rayatz on Yud Shevat 5710. "Historic Treasures," presented by Rabbi Sholom Ber Schapiro, shares the archives of Rabbi Dr. Nissan Mindel OBM, secretary of the 6th and 7th Chabad Rebbes