For some survivors of the Holocaust, the vow to "never forget" takes on a special meaning when they have only faded memories, or none at all, of parents they lost as young children. Leah Nebenzahl was a baby when her parents, Pipha and Zvi Herschman, were murdered in Nazi-occupied Poland. The Jewish infant, rescued by a priest who placed her in an orphanage run by nuns, survived World War Two as the adopted daughter of a Christian couple. On Wednesday, Holocaust survivors mark the 76th anniversary of the liberation of the Auschwitz death camp by Soviet troops. The stories and photos of Jewish youngsters, some of them orphans like Leah who were placed in seven children's homes for survivors in Europe after the war, are part of a new online exhibition - "My Lost Childhood" - by Israel's Yad Vashem Holocaust museum.