Polish born Holocaust survivor Halina Birenbaum (L) arrives to deliver a speech in front of survivors and personalities at a tent erected in front of the entrance of the former Nazi concentration camp Auschwitz-Birkenau during the main ceremony to mark the 70th anniversary of the liberation of the death camp on January 27, 2015 in Oswiecim, Poland. Seventy years after the liberation of Auschwitz, ageing survivors and dignitaries gather at the site synonymous with the Holocaust to honour victims and sound the alarm over a fresh wave of anti-Semitism. AFP PHOTO / ODD ANDERSEN