"We are seeing that now with the provision of (drones) to Russia." Ukraine says Russia has used Iranian-made Shahed-136 attack drones that cruise toward their target and explode on impact. Tehran denies supplying the drones to Moscow - an assertion Washington says is untrue - and Russia has denied its forces used Iranian drones to attack Ukraine. If such a resolution is not adopted by the deadline, all U.N. sanctions in place before the nuclear deal would be automatically reimposed. "Snapback" would also likely kill off efforts to revive the 2015 deal, which then-U.S. President Donald Trump abandoned and which his successor Joe Biden has sought to resurrect.

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