A Holocaust survivor pays tribute to fallen comrades putting her hand on the "death wall" execution spot in the former Auschwitz concentration camp in Oswiecim, Poland, on the 70th anniversary of the liberation of the Nazi death camp on January 27, 2015. 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