Groening trial 'The horror and barbarity just hit us'

Auschwitz survivors continue to testify at trial of a former guard at the Nazi death camp.

Oskar Groening, dubbed 'The Bookkeeper of Auschwitz', is accused of helping to murder more than 300,000 people.

Susan Pollack, who survived the concentration camp at Auschwitz, the death marches and Belsen, spoke to the BBC's Tim Muffett.