French President Nicolas Sarkozy said today a diplomatic push to rein in Tehran's nuclear programme was the only alternative to "an Iranian bomb or the bombing of Iran".
Mr Sarkozy said a nuclear-armed Iran would be unacceptable and that major powers should continue their policy of incrementally increasing sanctions against Tehran while being open to talks if Iran suspended nuclear activities.
"This initiative is the only one that can enable us to escape an alternative that I say is catastrophic: the Iranian bomb or the bombing of Iran," he said, adding that it was the worst crisis facing the world.
Tehran says it only wants to generate electricity but it has yet to convince the world's most powerful countries that it is not secretly pursuing nuclear weapons.
In his first major foreign policy speech, Mr Sarkozy emphasised his existing foreign policy priorities, such as opposing Turkish membership of the European Union and pushing for a new Mediterranean Union that he hopes will include Ankara.
He also presented some new ideas, such as possibly renewing high-level dialogue with Syria and expanding the Group of Eight industrialised nations to include the biggest developing states.
Mr Sarkozy also criticised Russia for its dealings on the international stage. "Russia is imposing its return on the world scene by using its assets, notably oil and gas, with a certain brutality," he said.
But the French leader had warm words for the United States, saying friendship between the two countries was important. But he said he felt free to disagree with US policies, highlighting what he called a lack of leadership on the environment.