patrol response by FPS uniformed police officers; full investigation by FPS special agents; prosecution by the U.S. Attorney's Office or State Prosecutor's Office; physical security enhancements and countermeasures; security briefings and workplace violence seminars administered by FPS law enforcement personnel; suspicious surveillance detection initiatives designed to detect pre-incident indicators of threats to federal employees, facilities and protectees; a monthly Operations Security Bulletin; and protection details for high-ranking officials within DHS. FPS Headquarters developed a Memorandum of Understanding, in collaboration with the U.S. Capitol Police, enabling the two entities to use each other's resources to effectively, efficiently and professionally respond to and investigate threats and inappropriate communications directed at members of Congress, their families and staff when outside the Washington, D.C., metropolitan area. FPS collaborates with other components within DHS and has established liaisons with agencies having a protective and investigative mission such as the U.S. Secret Service—National Threat Assessment Center, Social Security Administration (SSA), U.S. Marshals Service, FBI, U.S. Postal Inspection Service and various state and local police agencies throughout the country. FPS special agents have made arrests and conducted investigations of subjects charged with making inappropriate communications and threats to members of the U.S. Congress (House and Senate) and/or their staff, the director of Federal Emergency Management Agency, FPS Director, members of the military reserve, SSA, the Department of Veteran Affairs and other federal employees. Many of these investigations resulted in convictions for making threats to do physical harm and threats to bomb federal facilities. FPS special agents investigated threats delivered in person, via telephone, e-mail and U.S. Postal Service mail. FPS special agents also oversee an outreach program designed to educate the community and tenant agencies and provide them with a point of contact to report suspicious behavior and incidents that threaten FPS protectees, facilities, and/or visitors. Explosive Detection Dog Teams The mission of the Explosive Detector Dog (EDD) Teams is the protection of life and property and providing a strong visible and psychological deterrent against criminal and terrorist acts. Prior to the terrorist attacks of September 11, 2001, the FPS had a minimal program of 10 EDD Teams located in the Washington, D.C., metropolitan area. Since that time, the FPS EDD program has expanded to more than 60 teams nationwide. The EDD Teams conduct routine explosive searches of office areas, vehicles, materials, packages and persons housed in federally owned or leased facilities. The EDD Teams respond to