While in Baltimore on Sunday for an Adirei HaTorah event, HaRav HaGaon Yerucham Olshin, shlita, Rosh Yeshiva at Beth Medrash Govoha, came to Yeshivas Ner Yisroel, and after greeting the Rosh HaYeshiva, Moreinu HaRav Aharon Feldman, shlita, said a shiur on Mesechta Nedarim which the Yeshiva is learning this zman.