A little-known treaty provides transparency for confirming arms control agreements and serves as an important measure of the health of the U.S.-Russia relationship.

With the demise of the Islamic State, a revived al-Qaeda and its affiliates should now be considered the world’s top terrorist threat.

The latest recurrence of domestic protests in Iran stems from the country’s role in regional wars, combined with corruption and economic mismanagement. This discontent is likely to continue to pose a…