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Global Security Challenges

Global security challenges are threats that cross borders and cannot be handled by one country acting alone. They range from wars and weapons of mass destruction to disease, crime, and displaced people. The United States works on them through the military, diplomacy, intelligence, and international organizations, together with allies and partners.

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October 2last updated

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Latest in Global Security Challenges

Topics in Global Security Challenges

Dangerous weapons

The spread and control of the deadliest arms is covered in Weapons of Mass Destruction and Nonproliferation, Nuclear Weapons and Arms Control, and Chemical and Biological Weapons.

Threats without borders

Problems that move across frontiers are covered in Refugees and Displaced Persons, Pandemics and Global Health Security, Piracy and Maritime Security, and Transnational Crime.

All Articles on Global Security Challenges

Why the U.S., Russia, and China Are Ramping Up Nuclear Testing Activities

The specter of nuclear testing—a practice most Americans associate with Cold War-era footage of mushroom clouds—has returned to the headlines with alarming force. Vague…

25 Min Read

Israel-Hamas Ceasefire Deal: October 2025 Agreement Explained

After two years of conflict that reshaped the Middle East, Israel and Hamas agreed in early October 2025 to the first phase of a…

25 Min Read

Trump’s Gaza Peace Plan Explained

How Trump's Gaza plan handles hostages, security, aid, governance and statehood, and where its disputed implementation roadmap stands today.

23 Min Read

A History of US Policy Toward Venezuela: From Monroe to Maduro

The relationship between the United States and Venezuela spans nearly two centuries of dramatic shifts, from early republican partnership to today's bitter standoff. Formally…

25 Min Read

How U.S. Leaders Have Learned to Manage Nuclear Threats Since 1945

The atomic bombing of Hiroshima on August 6, 1945, changed warfare and international relations forever. American presidents, generals, and diplomats have spent the decades…

39 Min Read

How America Tracks Nuclear Threats

Nuclear threat evaluation isn't a single task handled by one agency. It's a massive, ongoing operation that involves dozens of government departments, national laboratories,…

37 Min Read

How America Responds to Nuclear Threats

America's nuclear response system operates around the clock, combining policy, technology, alliances, and public preparedness to prevent nuclear conflict. The system's primary goal is…

25 Min Read

How America Plans for Nuclear War

The United States maintains one of the world's most complex nuclear planning systems. It spans everything from high-level strategy documents to detailed emergency instructions…

43 Min Read

Leaving NATO: Will America Exit Its Oldest Alliance?

The North Atlantic Treaty Organization has been the cornerstone of transatlantic security for over 75 years, binding the United States to Europe's defense in…

41 Min Read

What is PEPFAR and Why Does It Matter?

The U.S. President's Emergency Plan for AIDS Relief is the largest commitment by any nation to combat a single disease in history. Launched by…

34 Min Read