Most bochurim who ever opened a קובץ שיעורים, even if only by mistake, couldn't help but read the fascinating תולדות, or Hakdomoh, written by his son, the late Reb Simcha Wasserman. The story of the passing of Reb Elchonon הי"ד al kiddush haShem is one that is better than most mussar seforim, so to speak. If you haven't yet, take a few moments in the future to do so. With him in the Ghetto, and maybe also in the same hiding place, was the Mashgiach of Slabodka, Harav Avrohom Grodzinski, הי"ד, brother in lw of Reb Yaakov Kamenetzki; they were both married to daughters of Reb Bere Hirsh Heller. Reb Avrohom was not taken to be killed that day, being that he was hiding in the attic. His son Reb Yitzchok, zol gezunt zein, recounts the story of what happened on that terrible day. Yud Aleph Tammuz marks 75 years since REW was murdered.
From the Hebrew Yated Ne'eman.