Nazi death camp survivors marked Holocaust Remembrance Day in Poland on Friday, while in Austria guests at a far-right ball were accused of “dancing on Auschwitz graves”. In the UN, President Obama Mitt Romney remembered the victims, while Norway and Romania acknowledged their roles in the World War II horror. Survivors joined Israeli and Polish officials at ceremonies for the 67th anniversary of the liberation of Auschwitz-Birkenau at the site of the former camp where the Nazis killed more than a million people, mostly European Jews.