ROME (AFP) - Iranian President Mahmoud Ahmadinejad slammed aggressive US policy in the Middle East on Tuesday, while insisting that the state of Israel will "certainly" disappear. The Iranian leader also taunted US President George W Bush, saying he was keen to attack Iran but would end his term in the White House without having done so after elections in November. "The United States (has) brought the Middle East nothing but threats, pressure and coercion," he told a Press conference at a summit on the global food crisis. "Bush is very much interested in a military attack against Iran. Several times he has tried to find excuses for such an attack, but every time he has failed," he said at the Food and Agriculture Organization (FAO) headquarters in Rome. "He's very eager for a war (but) he will actually bring his presidential term to an end with the grief of his failure," he said. In other comments he insisted that Tehran's nuclear programme does not breach international law. "Our nuclear programme is legal and transparent. We are not seeking more than our rights." He reiterated that the demise of the Jewish state "will certainly happen and is something that is already happening, whether we are involved in it or not." In other comments the Iranian leader said there were "many reasons to think that the American elections would not be free." "Whoever is elected will have to end the occupation of other countries and abandon the spirit of intimidation which reigns across the world," he said, when asked which of the US presidential hopefuls he would choose. In a speech to a food summit in Rome, Ahmadinejad slammed the West over its handling of the global food crisis, accusing certain "big powers" of acting with sometimes "devilish" motives. He notably called for the crisis to be tackled outside the United Nations system, alleging that major powers were imposing their will on the UN Security Council. He also alleged that western countries were acting to devalue the US dollar, fuelling the rise in oil and food prices. "Today the planners of the big powers act in order to devaluate (the) dollar," he said according to the official translation of his comments, accusing them of seeking to "impose their will on the market."  "We know that the devaluation of dollar and the increase of the energy prices are two sides of the same coin which are mentioned as some of the reasons behind the recent troubles," he said. But the Iranian leader questioned whether the crisis should be handled within the UN system at all. "How can the mechanism of the UN improve the situation when some of these powers decide for the Security Council which is the highest decision-making body and make instrumental use of it?" he said. "Basically, how can the existing mechanisms solve the problems when every country pursues its own policies based on its interest and when various wills and occasionally-devilish motivations and vast facilities are employed to impose unjust policies on global relations?"