In 2013, 14 American citizens or permanent residents were implicated in the U.S. on terror-related charges, ranging from domestic plots and conspiracies to providing material support to terrorists abroad. Many were directly influenced by propaganda easily accessible online.
Although the media has not been paying much attention, recent years have seen a steady stream of anti-abortion violence, from shootings to firebombings and arsons. Anti-abortion extremists believe that violence is justified if it will stop what they perceive as the murder of millions.
In recent years, a disturbing trend has emerged on the white supremacist scene in the United States. More and more white supremacists are developing links to motorcycle clubs across the country, including outlaw motorcycle gangs frequently involved with criminal activity. All of the major white supremacist movements have developed ties to the outlaw biker subculture, while some white supremacists have even formed their own biker gangs.
In recent years, the anti-government extremist "sovereign citizen" movement has experienced a considerable resurgence, which has resulted in a significant growth in both membership and activity - including violent activity - across the United States.