Continued from the biography of R. Zalman Duchman:
Half a year later, on 2 Nissan 5680 (1920), the Rebbe Rashab passed away in Rostov. Understandably, this was a difficult period for R. Zalman, who had been so connected to the Rebbe.
R. Zalman’s intense love for the Rebbe Rashab drove him to make the long and arduous trip to the Ohel for the Rebbe’s yahrtzeit each year. Before Beis Nissan, R. Zalman would board the train to Rostov, without knowing what lay ahead of him. Communist spies roamed the train looking out for “suspicious persons, ” and anti-Semitic thugs would regularly attack anyone they recognized as Jewish. But R. Zalman’s burning desire to be by his Rebbe on that special day made him ignore those fears.