The spree of murders at several Atlanta-area spas demonstrates the unique threat posed by rampaging assailants. A new system that alerts the public during such attacks could help save lives.

ISIS Beatles Trial Shines Light on U.S. Counterterrorism and Hostage Policy

China appears to be increasingly interfering in U.S. elections through intensive lobbying, control of foreign media outlets, and sophisticated disinformation campaigns.

Over the past decade, illiberal populist leaders from across the political spectrum have won elections and taken power in many of the world’s biggest democracies, from the United States to India, the…