Auschwitz was liberated 80 years ago. The spotlight is on survivors as their numbers dwindle

The world's focus will be on the remaining survivors of Nazi Germany's atrocities on Monday as world leaders and royalty join them for commemorations on the 80th anniversary of the liberation of Auschwitz.

The main observances take place at the site in southern Poland where Nazi Germany murdered over a million people, most of them Jews, but also Poles, Roma and Sinti, Soviet prisoners of war, gay people and others targeted for elimination in Adolf Hitler's racial ideology.

The anniversary has taken on added poignancy due to the advanced age of the survivors, and an awareness that they will soon be gone, even as new wars make their warnings as relevant as ever.