"U.S. policy must be clear and unequivocal: We cannot, we should not, we must not permit Iran to build or acquire nuclear weapons," the Democrat told a crowd of Israel supporters. "In dealing with this threat ... no option can be taken off the table."
Clinton spoke at a Manhattan dinner held by the largest pro-Israel lobbying group in the U.S., the American Israel Public Affairs Committee. Some 1,700 supporters applauded as she cited her efforts on Israel's behalf and spoke scathingly of Iran's decision to hold a conference last month that questioned whether the Holocaust took place.
"To deny the Holocaust places Iran's leadership in company with the most despicable bigots and historical revisionists," Clinton said, criticizing what she called the Iranian administration's pro-terrorist, anti-American, anti-Israeli rhetoric.
Iranian President Mahmoud Ahmadinejad has repeatedly called the Holocaust a myth and said Israel should be wiped off the map and its Jews returned to Europe.
Iran insists its nuclear program is designed to produce energy, not weapons.
Ahmadinejad said Thursday his government is determined to continue with its nuclear program, despite UN Security Council sanctions imposed over its refusal to halt uranium enrichment, a process that can produce fuel to generate electricity or for the fissile core of an atomic bomb.
Clinton, the front-runner for her party's presidential nomination, called for dialogue with foes of the United States, saying Iran uses its influence and its revenues in the region to support terrorist elements.
"We need to use every tool at our disposal, including diplomatic and economic in addition to the threat and use of military force," she said.
Iranian official: Underground cameras installed at Natanz plant
A top Iranian nuclear official said Friday that U.N. inspectors have
set up cameras in an underground facility where the country intends to install 3,000 new centrifuges to allow them to monitor the activity.
The official, speaking on condition anonymity because he was not authorized to give statements to media, said the cameras were put in place over the past few days, ending Thursday.
But a UN official in Vienna said Iran had met only some, not all, of the world body's requests for installing monitoring cameras at the underground site. The official spoke on condition of anonymity in exchange for discussing confidential information.
The underground facility is located in the central Natanz uranium enrichment plant that has been at the center of a tug-of-war between Iran and the international community.
The United Nations has demanded Iran suspend uranium enrichment and has imposed sanctions on the country in December for refusing to halt the process which could lead to Tehran producing a nuclear bomb.
The cameras have been installed on the basis of Iran's obligations, the official told The Associated Press, stressing that centrifuge installment has not yet started at Natanz.