Jan 27, 2015:

About 300 Holocaust survivors, along with French President François Hollande, German Chancellor Angela Merkel, and Polish President Bronisław Komorowski gathered for a memorial at the former Auschwitz Nazi death camp today, on the 70th anniversary of the camp's liberation by Soviet troops.

President Obama did not attend the memorial, but he did send a presidential delegation of ten people led by U.S. Department of Treasury Secretary Jacob J. Lew.

President Obama also issued a Statement by the President on International Holocaust Remembrance Day and the 70th Anniversary of the Liberation of Auschwitz-Birkenau.

Source:

(January 27, 2015). "Auschwitz survivors, world leaders mark 70th anniversary of camp's liberation". Reuters. Retrieved 2015-01-28.

January 27 was designated as International Holocaust Remembrance Day by the General Assembly of the United Nations, resolution A/RES/60/7, on November 1, 2005.

The documentary "Auschwitz: Inside the Nazi State" (6-episodes, 285-minutes), is an in-depth look at how and why the Auschwitz Nazi death camp came into being, how it operated, and how it evolved. As of January 28, 2015, this documentary was available on Netflix.

More:

• 'We Cannot Forget': Survivors Return to Auschwitz on Liberation Anniversary | NBC News
• Putin Won’t Attend Commemoration of Auschwitz Liberation | The New York Times
• Claude Lanzmann on why Holocaust documentary Shoah still matters | The Guardian
• The Holocaust | shoah.dk
• International Auschwitz Committee | auschwitz.info
• Auschwitz-Birkenau Memorial and Museum | auschwitz.org
• About the Holocaust and the United Nations Outreach Programme | un.org
• Auschwitz: Inside the Nazi State | pbs.org