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The Bureau of Diplomatic Security (DS) is the security and law enforcement arm of the U.S. Department of State. In international investigations, threat analysis, cyber security, counterterrorism, security technology, and protection of people, property, and information, the Bureau acts as a leader. The DS plays an important role in protecting U.S. embassies and personnel overseas, securing critical information systems, investigating passport and visa fraud, and fighting the war on terror.
Functions of the DS include:
a. providing a safe and secure environment for the conduct of the U.S. foreign policy;
b. acting as a forum for every diplomatic mission in the world;
c. protecting the Secretary of State, other high-ranking foreign dignitaries and officials visiting the U.S.;
d. investigating passport and visa fraud; and
e. conducting personnel security investigations.