Klausenberger Rebbe Asserting an Obligation to Study Torah on 9 Av
שו"ת דברי יציב אורח חיים סימן ר"מ 8 Av 5742 (1982)
What if there's an obligation to learn Torah on Tisha B'Av? That's what the Klausenberger Rebbe thought. What would make him think that?