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 crisis in Ukraine has not thus far diverted international diplomatic efforts toward a lasting deal on Tehran’s controversial nuclear program, says expert Barbara Slavin.

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…

F. Gregory Gause, a leading Saudi Arabia expert, says the U.S. plan to sell some $20 billion in sophisticated military hardware to Saudi Arabia and other Gulf states is part of a concerted effort in …

Moscow and Washington share a number of significant interests that require cooperation, despite heightened bilateral tensions over human rights issues, says former U.S ambassador Jack F. Matlock, Jr.