LOHHEIDE, GERMANY - MARCH 17:  A symbolic tombstone commemorates Anne Frank and her sister Margot on the site of the former Bergen-Belsen concentration camp on March 17, 2015 in Lohheide, Germany. Germany will commemorate the 70th anniversary of the liberation of Bergen-Belsen by British troops on April 15. Anne Frank, a young Dutch Jew who was deported to Auschwitz and later to Bergen-Belsen by the Nazis, is known for the diary she kept. An estimated 70,000 inmates died at Bergen-Belsen, including Jews and Soviet prisoners of war.  (Photo by Sean Gallup/Getty Images)