. >> reporter: that survivor is aaron's 85-year-old grandmother tova friedman, one of the last remainingwho's alive after living through the horrors of the auschwitz concentration camp. a "new york times" bestseller was written about the story of her life "the daughter of auschwitz." >> when i first came to concentration camp, there was a smell that i couldn't understand what it was. i'd never smelled anything like that. and i said, mom, what is that? and she said to me, she pointed to the crematorium. she said to me, "those are the burning bodies that have been gassed." >> reporter: tova vividly remembers being separated from her father at age 5. accepting her new reality with her mother inside the death camp. >> it was a complete and utter nightmare. you thought you'd wake up, but you didn't wake up. >> reporter: tova remembers one horrific day when she was corralled with a group of children. >> the kids were going to be -- to the gas chamber. and we went into the waiting room at the gas chamber. waiting room. and we waited and waited, and they yelled and screamed in german, and then t