Survivors of the Nazi's notorious Auschwitz death camp are taking center stage at the memorial service to mark 80 years since its liberation by Soviet troops.

The 80th anniversary of the liberation of Auschwitz was widely acknowledged Monday as the last major observance that any notable number of survivors will be able to attend.

Monday is International Holocaust Remembrance Day. On this day 80 years ago, Russian soldiers liberated the Auschwitz concentration camp.