VIENNA (Reuters) - U.N. nuclear watchdog chief Rafael Grossi flew to Iran on Monday hoping to bolster his agency's oversight of Tehran's atomic activities after various setbacks, but analysts and diplomats say he has limited leverage and must be wary of empty promises.
Then-U.S. President Donald Trump's decision in 2018 to ditch a landmark deal between Iran and major powers that exchanged nuclear restrictions for sanctions relief caused that accord to unravel. Iran has since accelerated its uranium enrichment and reduced cooperation with the International Atomic Energy Agency.