WASHINGTON — As the United States and Iran continue efforts to reach a long-term nuclear agreement, it is becoming increasingly evident that they are tacitly aligned in a longer-term struggle against the mutual threat of Sunni extremism.
US Defense Secretary Ashton Carter indirectly confirmed July 7 that the “boots on the ground” battling the group that calls itself the Islamic State (IS) are primarily forces also backed by Iran, including Shiites and Kurds.