The United States and the Taliban signed an agreement aimed at ending the eighteen-year war in Afghanistan, but many factors could still disrupt the peace process.

For many policymakers, economic sanctions have become the tool of choice to respond to major geopolitical challenges such as terrorism and conflict.

Relations between the two countries, long bound by common interests in oil and security, have strained over what some analysts see as a more assertive Saudi foreign policy.

One of the world’s most-watched news networks is at the center of a geopolitical rift between a Saudi-led bloc and the broadcaster’s funder, Qatar.

The Federal Bureau of Investigation has been reoriented toward counterterrorism in recent years, but continues to face charges of overreach.