Iran's President Mahmoud Ahmadinejad addresses the 65th United Nations General Assembly at U.N. headquarters in New York, September 23, 2010. [Xinhua/AFP Photo]

For his part, the leader of the Islamic Republic of Iran told delegates the Prophet Mohammad "presented the perfect and all inclusive religion" but "the egotist and the greedy" opposed the message.

"The lust for capital and domination replaced monotheism which is the gate to love and unity," he said. "This widespread clash of the egoist with the divine values gave way to slavery and colonialism" which, in turn gave way to "terrorism, illicit drugs, poverty and the social gaps."

"We all were saddened" by the Sept. 11, 2001 attacks in the United States and the "view" the attacks were carried out by a terrorist group was "the main viewpoint advocated by American statesmen," he said.

But, the "majority of the American people as well as other nations and politicians agree" that "some segments within the U.S. government orchestrated the attack to reverse the declining American economy and its grips on the Middle East in order also to save the Zionist regime" in Israel.

This prompted the U.S. delegation to walk out of the huge General Assembly Hall, taking the long route down toward the front to ensure its demonstration was noticed.

Ahmadinejad proposed "that the United Nations set up an independent fact-finding group for the event of the Sept. 11 so that in the future expressing views about it is not forbidden.

The accusation 9/11 was a self-inflicted wound was so offensive, Mark Kornblau, spokesman for the U.S. Mission to the United Nations, said, "Rather than representing the aspirations and goodwill of the Iranian people, Mr. Ahmadinejad has yet again chosen to spout vile conspiracy theories and anti-Semitic slurs that are as abhorrent and delusional as they are predictable."