Editor’s Note: Counterterrorism officials often express considerable concern about lone wolf terrorists -- individuals who act without direct ties to an existing group -- because they are difficult to de...

Editor’s Note: For over a decade, the Islamic State and its predecessors focused almost exclusively on Iraq, Syria, and their neighbors. The downing of the Russian airplane over the Sinai Peninsula and e...

Last Tuesday’s Wall Street Journal (November 10, 2015) carried a front-page story titled “Ukraine: Cyberwar’s Hottest Front.”