Iran and the US negotiate nuclear program in Oman

Negotiations between Iran and the United States over Tehran's rapidly advancing nuclear program will return Saturday to the secluded sultanate of Oman, where experts on both sides will start hammering the technical details of any possible deal. The talks seek to limit Iran's nuclear program in exchange for the lifting of some of the crushing economic sanctions the U.S. has imposed on the Islamic Republic closing in on half a century of enmity. U.S. President Donald Trump has repeatedly threatened to unleash airstrikes targeting Iran's program if a deal isn't reached. Iranian officials increasingly warn that they could pursue a…