In all, the Nazi regime murdered 6 million Jews from all over Europe, annihilating two-thirds of Europe's Jews and one-third of all Jews worldwide. In 2005, the United Nations designated Jan. 27 as International Holocaust Remembrance Day.

Silence pervades the site of Auschwitz-Birkenau today. Sometimes the only sounds are the soft footsteps of visitors, people who come from all over the world to mourn and to learn, and the voices of their guides speaking in hushed tones into microphones trying to explain the ungraspable.

This International Holocaust Remembrance Day marks the 80th anniversary of the liberation of Auschwitz-Birkenau, the Nazi labor and extermination camp where 1.1 million people were murdered. SS chief Heinrich Himmler was the mastermind of what’s known as the “final solution” the deliberate and systematic plan for the mass murder of the Jewish people

King Charles to visit Auschwitz on 80th anniversary of Nazi camp liberation - Charles will travel to Poland to commemorate milestone with foreign monarchs, presidents, prime ministers and Holocaust survivors,

The Illinois Holocaust Museum celebrated the 80th anniversary of the Auschwitz Concentration Camp liberation with Holocaust survivor Manfred Goldberg, who is now one of a dwindling number of survivors still alive.

Tova Friedman, 86, is one of a dwindling number of survivors sharing their message on Holocaust Remembrance Day 2025.

In a solemn memorial, survivors and world leaders gathered at the Auschwitz concentration camp in Poland to mark the 80th anniversary of its liberation. NBC News' Jesse Kirsch reports.