This is a remarkable story of one of the enduring tragedies of the Holocaust: the shattering of so many families. Parents, brothers and sisters vanished -- their fates unknown. Seven decades later, as CBS News correspondent Anthony Mason reports, there's now an effort to piece together the stories before they're lost forever.

Pulled from the archives of the United States Holocaust Memorial Museum in Washington are photos of children -- more than 1,100 of them who were orphaned or displaced by the Nazi persecution.

These portraits were taken by aid workers trying to reunite the children with surviving families.

"Most of them were in hiding during the war and after the war, they were put into children's homes all over Europe," said Lisa Yavnai, who heads a new project called "Remember Me."