Rabbi Israel Meir Lau from Israel, left, United Nations Secretary General Ban Ki-moon, center, and former Auschwitz prisoner Marian Turski talk as they walk in the former German Nazi Death Camp Auschwitz-Birkenau, in Oswiecim, Poland, Monday, Nov. 18, 2013. On the first day of his visit to Poland, Ban Ki-moon came to Auschwitz-Birkenau and on Tuesday will attend the U.N. Climate Conference held in Warsaw. (AP Photo/Alik Keplicz)