Iran and the United States held their first technical-level talks on Tehran’s rapidly advancing nuclear program Saturday, a more complex phase of their high-stakes negotiations. “The negotiations this round were much more serious than in the past,

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.

Nuclear experts from the US and Iran are due to meet in Oman. The turn to diplomacy indicates Trump is erring against reviving a maximum pressure strategy with Tehran.