As the world prepares to mark International Holocaust Memorial Day on Sunday, Israel’s national memorial to the Holocaust has launched a massive online project to commemorate the six million Jewish victims of Nazism. The “IRemember Wall” campaign — organized by Yad Vashem in Jerusalem for the five days around International Holocaust Memorial Day, which falls on Jan. 27 — “provides a unique opportunity for the wider public to engage in an interactive commemorative activity,” its organizers explained in their announcement of the project.