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Explore terrorism trends through five data charts that help show the threat of terrorism around the world and how it has changed over time.

How a Single Phrase Defined the War on Terror

What is the 2001 AUMF and what does it have to do with 9/11? From the invasion of Afghanistan, to the Iraq War, and more, learn how the United States justified U.S. counterterrorism policy for over two decades.

Who Counts As a Terrorist?

What are the major types of terrorism? From foreign groups to domestic threats, learn how the U.S. government defines terrorism and its legal consequences.

The Nuclear Nonproliferation Treaty

What is the NPT and how has the treaty influenced the spread of nuclear weapons?

South Africa: Why Countries Acquire and Abandon Nuclear Bombs

Why did South Africa give up its nuclear weapons? In this historical case study, learn about the only country in the world to have developed and then dismantled its nuclear program.

How Do Countries Create Nuclear Weapons?

What is nuclear power and how can the same process that generates nuclear energy create a nuclear bomb?

The Nuclear World

Where are the world’s nuclear weapons today and whom do they protect? Explore maps, charts, and graphs to learn about current and future nuclear weapons states.