Prewar photograph of three Jewish children with their babysitter. Two of the children perished in 1942. Warsaw, Poland, 1925-1926. Photograph »

Two German Jewish families at a gathering before the war. Only two people in this group survived the Holocaust. Germany, 1928. Photograph »

A Jewish family in the Piotrkow Trybunalski ghetto. All those pictured died in the Holocaust. Poland, 1940. Photograph »

Two young cousins shortly before they were smuggled out of the Kovno ghetto. A Lithuanian family hid the children and both girls survived the war. Kovno, Lithuania, August 1943. Photograph »

Two young brothers, seated for a family photograph in the Kovno ghetto. One month later, they were deported to the Majdanek camp. Kovno, Lithuania, February 1944. Photograph »

A brother and sisters, members of a Jewish family; one of the sisters pictured here, along with other family members, did not survive the Holocaust. Nove Zamky, Czechoslovakia, May 1944. Photograph »

Portrait of members of a Hungarian Jewish family. They were deported to and killed in Auschwitz soon after this photo was taken. Kapuvar, Hungary, June 8, 1944. Photograph »