Family members, survivors and other participants walk to a memorial at the former concentration camp during a ceremony to mark the 70th anniversary of the liberation of the Bergen-Belsen concentration camp in Bergen, northern Germany, Sunday, April 26, 2015. More than 52,000 people died in the Nazi terror in Bergen-Belsen, among them the famous teenage diarist Anne Frank, until British troops liberated the camp in April 1945. (AP Photo/Martin Meissner)