As people around the world marked Holocaust Remembrance Day, once again promising to “never forget” the genocide that killed 6 million Jews during World War II, a new study shows Americans appear to be doing just that. The study released Thursday by the Conference on Jewish Material Claims Against Germany, found two-thirds of American millennials cannot identify what Auschwitz is. Twenty-two percent of millennials said they haven’t heard of the Holocaust or are not sure whether they’ve heard of it.