Negotiations between Iran and the United States over Tehran’s rapidly advancing nuclear program are set to return to the secluded sultanate of Oman.

Negotiations between Iran and the United States over Tehran's rapidly advancing nuclear program will return on Saturday to the secluded sultanate of Oman, where experts on both sides will start hammering out the technical details of a possible deal.

Iran and the United States are preparing to start in-depth negotiations in Oman over Tehran’s rapidly advancing nuclear program, talks that likely will hinge on the Islamic Republic’s enrichment of ur