"Violent extremism—generally defined as supporting or committing violent acts to achieve political, ideological, religious, or social goals—has been perpetrated and promoted by a broad range of groups in the United States for decades. Such groups include white supremacists, anti- government groups, and groups with extreme views on abortion, animal rights, the environment, and federal ownership of public lands; and radical Islamist entities, such as the Islamic State of Iraq and Syria (ISIS), among others. The September 11, 2001, attacks account for the largest number of fatalities in the United States resulting from violent extremism. According to the U.S. Extremist Crime Database (ECDB), since the September 11 attacks, 85 attacks in the United States by violent extremists—associated with both radical Islamist and far right ideologies—have resulted in 225 fatalities."