Eighty years after the liberation of the Auschwitz-Birkenau concentration camp, survivors and VIPs attend a unique commemoration to mark Holocaust Memorial Day, hosted by Reeta Chakrabarti. The ceremony commemorates the six million Jewish men, women and children who were brutally murdered by the Nazis in the Holocaust, and other victims of Nazi persecution. It also commemorates those who were murdered in the genocide in Bosnia 30 years ago and in other more recent genocides. Through music, readings and powerful personal testimony, the victims of these appalling events are remembered. Among those taking part in this annual event are cellist Sheku Kanneh-Mason, the Countess of Wessex's String Orchestra and Rob Rinder.