The U.S. government warned of possible attacks on entertainment venues and mass gatherings.
The Catalonia attacks are a case study in the future of violent extremism. Governments need to figure out how to respond.
With a government in crisis facing an increasingly dangerous terrorist threat, new options are on the table that could erode society’s resistance to further attacks.
Nuance and dignity aren't in the president's diplomatic playbook.
The president's counterterrorism strategy appears to be a dysfunctional combination of repurposed elements of the Bush and Obama approaches infused with some of Trump’s worst impulses
The latest in a spate of attacks in Egypt against Christians.
Giving ordinary places symbolic value is what terrorists want.
The attack occurred on one of Stockholm's busiest pedestrian streets.
A top U.S. military commander called the attack 'an unspeakable crime.'
Muslim-majority countries aren't the problem. It's the American face of ISIS we need to worry about.
Meanwhile, the death toll for refugees trying to make it to Europe has hit 5,000.
Europe’s refugee crisis tinges political reaction to the Christmas market assault.
The GOP nominee spars with his Democratic rival and the White House over how to prevent the kind of attacks seen in Minnesota, New York and New Jersey after arrest of U.S. citizen of Afghan descent.