Iran and the United States have begun a new round of nuclear talks in Rome, mediated by Oman, to address their long-standing dispute over Tehran's atomic ambitions. The talks come amid President Donald Trump's threat of military action if diplomacy fails. Both sides described the first round of talks in Muscat as productive. Washington is seeking a halt to Iran's uranium enrichment, while Iran wants the lifting of sanctions and guarantees that the U.S. will not renege on any agreement. Israel has not ruled out an attack on Iran's nuclear facilities in the coming months.