Eva Szepesi, 92, is traveling this week to the Nazi concentration camp she narrowly survived, where her mother and brother were both murdered. Szepesi, who grew up in Slovakia and now lives in Frankfurt,

The early 20th century tyrannies concluded with Soviet gulags and Nazi camps for those who questioned authority. Genocide became a legalized and socially accepted political tool. People were surfeit with and directed by ideologically dictated hatred of the politically singled out other. The world succumbed to Auschwitz.

Some of the few remaining survivors of Auschwitz will gather at the site of the Nazi death camp on Monday as the world marks the 80th anniversary of its liberation in the final months of World War II.

When Teresa Regula arrived at Auschwitz as a 16-year-old, the first real pain she experienced was of her ears burning. "They shaved us down to bare skin, and it was a scorching hot day, August 4... That was the first authentic pain I felt,

Jan. 27, marks International Holocaust Day. NBC News' Jay Gray reports from Auschwitz, where the 80th anniversary of its liberation will bring forth memories and messages that resonate today.