The Islamic State opened up a new front when it downed a Russian passenger plane in October over Egypt’s Sinai Peninsula. U.S. and allied attention understandably focuses on the terrorism threat posed by...

Editor's Note: The Islamic State has metastasized beyond Iraq and Syria, establishing so-called “provinces” in many Muslim countries. This spread has alarmed U.S. officials, and Yemen – home of Al Qaeda’...

Editor's Note: The 2015 Islamic State attacks in Paris highlighted not only the terrorist threat to Europe, but also the many European failings in intelligence and border security. Marc Hecker of the Fre...