Historians' knowledge of primary sources, contextual nuances and contingent events show that they have much to offer scholars and policymakers working on terrorism.

Now that Afghanistan is no longer an area of active hostilities, strikes should be subject to the standard of near certainty.

Canada is rethinking its approach to intelligence gathering and analysis and prioritizing its own national interests.

The United States has a range of options for its new Afghanistan policy.

Officials whitewashing the Taliban as a responsible diplomatic party are getting the organization wrong.

Al-Qaeda will now have a more permissive environment in which to operate, but the precise context will be important for the U.S. policy response.

White supremacists and other far-right ideologues are drawing inspiration from Ted Kaczynski's anti-technology manifestos.

Spain's close counterterrorism cooperation with Morocco provides a model for effective international efforts to prevent terrorist attacks.

Does the United States still have the grit necessary to fight and win long wars?

The Syrian government got off the hook for facilitating the terrorist group's rise and funding its operations.

The presence of international terrorist groups may grow in the months and years ahead, but there are steps the United States can take to mitigate the risks.

Cyberattacks present unique challenges, but governments and businesses can learn from other forms of hostage-taking.