"The Bureau of Diplomatic Security (DS), the law enforcement and security arm of the U.S. Department of State, provides a secure environment for the conduct of American diplomacy. To advance American interests and foreign policy, DS protects people, property, and information at more than 285 State Department missions worldwide. DS is the most widely represented U.S. security and law enforcement organization in the world, and a leader in international investigations, threat analysis, cyber security, counterterrorism, and security technology." This report is an overview of DS and their activities in 2010.
United States Department of State: http://www.state.gov/