The Bureau of Counterterrorism's mission is to promote U.S. national security by taking a leading role in developing coordinated strategies and approaches to defeat terrorism abroad and securing the counterterrorism cooperation of international partners.
The Office of the Under Secretary of State for Arms Control and International Security leads the interagency policy process on nonproliferation and manages global U.S. security policy, principally in the areas of nonproliferation, arms control, regional security and defense relations, and arms transfers and security assistance.
The United States Department of Defense is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the U.S. government directly related to national security and the United States Armed Forces.
The Library of Congress' Congressional Research Service (CRS) presents unbiased reports on various public policy issues for members of Congress, their staff, and the American public.