The cry of “never again,” raised by so many in the years after the end of the Holocaust 1945, has rung increasingly hollow with the passing decades, Kofi Annan, former secretary general of the United Nations, protested in an op-ed Friday in the International Herald Tribune. “The Holocaust remains unique … but instances of genocide and large-scale brutality have continued to multiply — from Cambodia to the Congo , from Bosnia to Rwanda , from Sri Lanka to Sudan ,” he said. “It is surprisingly hard to find education programs that have clearly succeeded in linking the history of the Holocaust...