‘The letter - thought to be the first from an Iranian president to a US leader since Iran's 1979 revolution - sparked intense interest, coming at a time of acutely tense relations between Washington and Tehran. The 18-page document has not yet been made public, but according to leaks, Mr Ahmadinejad spoke of the invasion of Iraq, a US cover-up over the 11 September 2001 attacks, the issue of Israel's right to exist and the role of religion in the world. '