"The Department of Homeland Security (DHS) has developed a Countering Violent Extremism (CVE) and Active Shooter approach that applies to all forms of violent extremism or crimes, regardless of ideology; and that focuses not on radical thought or speech, but instead on preventing violent attacks. This approach is designed to support the National Strategy on Empowering Local Partners to Prevent Violent Extremism and the Strategic Implementation Plan (SIP) for Empowering Local Partners to Prevent Violent Extremism in the United States which President Obama released in 2011. To support this initiative, the Department is working with a broad range of partners to gain a better understanding of the behaviors, tactics, and other indicators that could point to potential violent crime or terrorist activity within the United States, and the best ways to mitigate or prevent that activity. One of the venues used by DHS to promote information and intelligence sharing on a broad range of topics is the Homeland Security Information Network (HSIN). This network provides a secure and trusted environment for information sharing and collaboration between Federal, State, Local, Tribal, Territorial, private sector, civilian and international partners engaged in prevention, preparedness, detection, response, and recovery of all threats, crimes, hazards, and incidents."
United States. Department of Homeland Security: http://www.dhs.gov/