It’s a story my grandfather never told me, something that I only heard and understood later, years after my mother recounted it. In 1943, after his first wife and children were killed, my grandfather, Sam Wasserman, participated in one of the only successful mass escapes from a Nazi extermination camp. He and hundreds of other prisoners, overwhelmed and killed several guards and escaped the Sobibor death camp in Poland. My grandfather eluded capture, joined a band of partisans fighting the Nazis, and shortly after surviving the war, met the woman who would become my grandmother.