Liz Carney joins an extraordinary journey of discovery and reconciliation.
150 Arab Israelis, led by a priest from Nazareth, are travelling to Auschwitz.
They believe that the only way to achieve peace in the Middle East will be to understand the suffering of the other side.
At a time when Holocaust denial is rising in the Arab world, they are seeking to turn the tide.
They will be accompanied by a group of Jewish Israelis and Jews from overseas, who themselves will be seeking to understand the Arab mind and Arab history.