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Arms Control and International Security

The Office of the Under Secretary of State for Arms Control and International Security serves as senior adviser to the president and the secretary of state for arms control, nonproliferation, and disarmament.

Phone number

1-202-647-4000

TTY

1-800-877-8339

Main address

U.S. Department of State
2201 C St., NW
Washington, DC 20520
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