Last February I led a historic visit to the Auschwitz-Birkenau Concentration Camp with more than 150 political and religious leaders, mostly from Arab and Muslim countries.

UNESCO: EDUCATION

The crowd held a moment of silence, then marched to the city's old railway station, where the first trains departed for the Auschwitz-Birkenau concentration camp complex.

NPR: Jews In Greece Mark WWII Nazi Deportation

The date is of course significant as it was on this day in 1945 that the Auschwitz Birkenau Nazi Concentration and Extermination Camp was liberated.

UNESCO: UN International Holocaust Remembrance Day 2013