Fairfax County resident Irene Weiss, 85, tells an audience about her experience as a 13-year-old teenager at the Auschwitz-Birkenau concentration and extermination camp in Poland, where most of her family was murdered and she toiled daily in forced labor for more than a year with her older sister, Serena. Her eyewitness account received a standing ovation Sunday at a Holocaust Remembrance seminar called “Seeking Justice: 70 Years After Nuremberg.”