Since the Department’s inception in 2003, as stipulated in the Homeland Security Act, preventing terrorist attacks against the United States and the American people and enhancing security have been and continues to be the foremost missions of the Department of Homeland Security (DHS). The Department’s first Quadrennial Homeland Security Review (QHSR), released on February 1, 2010, reiterates that preventing terrorist attacks in the United States is the first of DHS’s five primary missions. DHS also integrates preventing terrorism into its four other primary missions—securing and managing our borders, enforcing and administering our immigration laws, safeguarding and securing cyberspace, and ensuring resilience to disasters of all kinds.
In order to prevent threats and reduce risk, we work with our international partners to identify, detect, and ultimately prevent threats from materializing, and to mitigate and respond to them when they do. (pdf at euro-police)
