Ivor Perl, one of the Holocaust’s last living survivors, was just 12 years old when he was taken to the notorious concentration camp, Auschwitz. Decades later, he returned to Auschwitz, now a museum and memorial, with his daughter as she encouraged him to confront the trauma of his past. Subscribe on YouTube: bit.ly/1BycsJW In this scene from "The Last Survivors," Perl and other Holocaust survivors recount how they are haunted by what they saw at Auschwitz, and they continue to wrestle with questions that can never be answered. Watch "The Last Survivors" starting April 30: to.pbs.org/2UJa68V Twitter: twitter.com/frontlinepbs Facebook: www.facebook.com/frontline Google+: plus.google.com/+frontline/posts FRONTLINE is streaming more than 200 documentaries online, for free, here: to.pbs.org/hxRvQP Funding for FRONTLINE is provided through the support of PBS viewers and by the Corporation for Public Broadcasting. Major funding for FRONTLINE is provided by the John D. and Catherine T. MacArthur Foundation and the Ford Foundation. Additional funding is provided by the Abrams Foundation, the Park Foundation, The John and Helen Glessner Family Trust, and the FRONTLINE Journalism Fund with major support from Jon and Jo Ann Hagler on behalf of the Jon L. Hagler Foundation.