Source: http://www.reuters.com/article/idUSTRE68M55W20100923

(Reuters) - Iranian President Mahmoud Ahmadinejad told the United Nations on Thursday most people believe the U.S. government was responsible for the attacks of September 11, 2001, prompting the U.S. delegation to leave the room in protest.

In his speech to the General Assembly, Ahmadinejad said it was mostly U.S. government officials who believed the Islamist militant group al Qaeda was behind the suicide hijacking attacks that brought down New York's World Trade Center and hit the Pentagon.

Another theory, he said, was "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 to save the Zionist regime." Ahmadinejad usually refers to Israel as the "Zionist regime."

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Video: http://www.youtube.com/watch?v=VdQOeCitfws (1:42)

Video: http://cnn.com/video/?/video/us/2010/09/23/sot.ahmadinejad.remarks.911.cnn (4:00)