A red nose of a clown is thrown at Iranian President Mahmoud Ahmadinejad by an activist, as he delivers his speech, at the UN Racism conference at the United Headquarters in Geneva, Switzerland, Monday, April 20, 2009. Iranian President Mahmoud Ahmadinejad accused Israel of being the "most cruel and racist regime" sparking a walkout by angry Western diplomats at a U.N. racism conference and protests from others.