Three Western academic disciplines have risen to the challenge of interpreting the jihadist enemy: political science, military science and history. It would seem natural for political and military scientists to discern form and pattern in the revolutionary movement that is seizing many of the headlines of the 21st century. On the other hand, historians would be ill at ease explaining the significance of current events and discerning trends within them...

Hoover Institution fellow Herb Lin discusses the Islamic State's shifting internet activities, which may make it harder to track.

If you were a senior government official or a CIA officer involved with the capture, transport, torture or accidental killing of high-value terrorists in the 2000s, you probably shouldn't travel to Europe.

It is difficult to think of two issues with a greater potential to negatively impact both our environment and the global economy than climate change and cyber attacks.