--Several times Ahmadinejad has questioned accepted version of Al-Qaeda strikes on New York and Washington which killed nearly 3,000 people 12 Apr 2010 Iran's President Mahmoud Ahmadinejad has written to UN chief Ban Ki-moon, asking him to launch an investigation into the September 11, 2001 attacks on the United States, news reports said on Monday. "The minimum expectation from your excellency is to set up an independent and trusted fact-finding group to comprehensively investigate the real factors behind September 11," Ahmadinejad said in the text of the letter carried by official news agencies.

Ahmadinejad urges Ban to probe 9/11 attacks