With tensions high in the Persian Gulf, all eyes will be on Iranian President Hassan Rouhani on Wednesday as he speaks on the second day of the UN General Assembly's annual gathering of world leaders.
On Wednesday, an Iranian official said the possibility of a meeting between Rouhani and US President Donald Trump was zero.
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Many of the world's leaders have used their speeches so far to defend the multilateralism embodied by the United Nations at a time when the US and other nations are sliding toward unilateralism and going it alone.
In a flurry of diplomatic activity this week, European and other leaders have pushed for a thaw in the nuclear standoff between Iran and the US.
But Rouhani has hinted at only the faintest possibility of a breakthrough.
He said he would not even consider meeting with Trump until the US lifted crippling sanctions imposed in the wake of Trump's pullout from a nuclear deal. The Iranian told a group of US media leaders that his government would first need a clearer idea of what the US administration actually seeks.
Rouhani's speech comes a day after Trump took his turn at the UN General Assembly, blasting what he called Iran's "bloodlust" and rising aggression. The US has blamed Iran for recent strikes on oil facilities in Saudi Arabia that have rattled the Middle East and global oil markets. Iran has denied being behind the attacks, saying they were solely the work of Yemeni rebels.
Rouhani said he had some optimism that the departure of national security adviser John Bolton could change US behavior, but he had seen "no tangible evidence" of that yet.
At the UN meetings this year, Rouhani said he would remind many leaders that Iran is still here, despite what he described as mistaken promises from Bolton that tough sanctions would destabilize the Islamic republic's leadership.
