The Domestic Extremism Lexicon is a reference aid released by the United States Department of Homeland Security (DHS) that defines different classifications of extremists. The document was released on March 26, 2009. References External links DHS Domestic Extremism Lexicon Rightwing Extremism: Current Economic and Political Climate Fueling Resurgence In Radicalization and Recruitment 7 April 2009 Terrorism in the United States United States Department of Homeland Security Extremism