An interim nuclear accord between Iran and world powers is still within reach despite lingering disagreements over details, says expert Barbara Slavin.

Nuclear diplomacy between Iran and a group of major powers may miss a significant deadline in July, but both sides appear intent to continue, says expert George Perkovich.

A clear sign of a new Iranian nuclear posture will be if incoming president Hassan Rowhani pursues bilateral talks with the United States, says former top U.S. arms official Gary Samore.

The prospects for a comprehensive nuclear deal with Iran before a looming deadline look promising, but the United States and its negotiating partners still must clear major obstacles, says expert Suz…

Russia’s military buildup in Syria could set back the self-proclaimed Islamic State and lay the groundwork for a political transition, but could also lead to a confrontation with the United States, s…