The latest mass shootings have prompted calls for more vigorous action by U.S. counterterrorism authorities, but the target is elusive.

Houthi attacks against commercial ships in the Red Sea have upended global shipping. The disruptions could soon ripple through the global economy.

Al-Qaeda could benefit from the death of the Islamic State’s leader, potentially regaining its worldwide reach and influence.

The attack in eastern Germany is another alarming example of how the terrorist threat is evolving, with more far-right perpetrators attempting to broadcast their brutality.