OSWIECIM, POLAND - JANUARY 27: German President Joachim Gauck (C) greets Dutch Queen Maxima as Dutch King Willem-Alexander looks on prior to ceremonies marking the 70th anniversary of the liberation of Auschwitz at the former Auschwitz-Birkenau concentration camp on January 27, 2015 in Oswiecim, Poland. International heads of state, dignitaries and over 300 Auschwitz survivors are attending the commemorations for the 70th anniversary of the liberation of Auschwitz by Soviet troops on 27th January, 1945. Auschwitz was among the most notorious of the concentration camps run by the Nazis during WWII and whilst it is impossible to put an exact figure on the death toll it is alleged that over a million people lost their lives in the camp, the majority of whom were Jewish. (Photo by Sean Gallup/Getty Images)
