Holocaust deniers and white supremacists united this week at a Tehran conference to "debate" whether the well-documented Nazi slaughter of 6 million Jews actually happened. There was no real debate, though, as the overwhelming evidence of the Holocaust amassed by the world's most respected historians was not presented. The conference was the brainchild of Iranian President Mahmoud Ahmedinejad, a noted Holocaust denier who has declared that Israel should be "wiped off the map." Iran's Foreign Ministry said 67 people from 30 countries participated in the forums. Among those "representing" the U.S. was former Ku Klux Klan leader David Duke, who said the Nazi gas chambers were a myth created to bolster support for a Jewish state.