Kofi Anan and Iranian President Mahmoud Ahmadinejad disagreed sharply on Iran's nuclear program, on an Iranian presentation of cartoons mocking the Holocaust, and on the then upcoming International Conference to Review the Global Vision of the Holocaust, an Iranian Holocaust denial conference in 2006. During a visit to Iran instigated by continued Iranian uranium enrichment, Annan said "I think the tragedy of the Holocaust is an undeniable historical fact and we should really accept that fact and teach people what happened in World War II and ensure it is never repeated.