80 years since Auschwitz-Birkenau liberation

Holocaust survivors and world leaders are marking the 80th anniversary of the camp's liberation at a memorial ceremony in Poland. We hear from one of the dwindling number of Auschwitz survivors, and speak to two distinguished historians about the warnings that the Holocaust still sounds. Also in the programme: thousands of Palestinians return to northern Gaza as Israel opens checkpoints; and a new play on race, property and class in South Africa.(Photo: A general view of the area of the former Auschwitz camp. Credit: Jarek Praszkiewicz/EPA-EFE/REX/Shutterstock)