The events of September 11, 2001, set in motion sweeping changes to U.S. intelligence and counterterrorism practices, launched two major wars, and altered Americans’ daily routines. This timeline tra…

The nuclear arms race was perhaps the most alarming feature of the Cold War competition between the United States and Soviet Union. Over the decades, the two sides signed various arms control agreeme…

The Somalia-based Islamist insurgent group al-Shabaab has proved resilient, committing brazen terrorist attacks at home and abroad despite strategic setbacks in recent years.

The quadrennial U.S. presidential nominating conventions are usually dominated by domestic themes. But they have at times been flavored by global economic concerns and national security threats, offe…