Bureau of International Security and Nonproliferation

The Bureau of International Security and Nonproliferation (ISN) is a part of the U.S. Department of State focused on preventing the spread of harmful weapons, such as nuclear, chemical, and biological weapons, and promoting secure, peaceful international relations. It works with other countries to enforce treaties, strengthen security measures, and reduce threats from weapons of mass destruction. Its goal is to enhance global stability by stopping the proliferation of dangerous technologies and ensuring responsible management of these materials, thereby protecting people and countries worldwide.