Inspiring

According to the ruling of the Chief Rabbinate, Yom Hashoah should be commemorated on Asarah Bi-teves. According to many Gedolei Yisrael and Roshei Yeshiva, the correct day for Yom Hashoah is Tisha B'av. However, the Israeli government decided on the 27th of Nissan and that is when it is generally commemorated. That being the case - there is a series of shiurim given on questions that came up during the Holocaust that was given about a decade ago [OHHHHH HOW TIME FLIES!!!]. 

Here is one and another [about 2 dozen in the series]. Besides the halachic knowledge gained, it is nothing less than awe inspiring to see the Mesirus Nefesh of Jews to keep the halacha under the worst of conditions.