Abdul Alim Musa, born Clarence Reams, is an American Islamist extremist who founded the radical group As-Sabiqun as well as the Islamic Institute of Counter-Zionist Psychological Warfare. Musa has claimed that the Jews ran the Trans-Atlantic slave... Read more

Mohammed Emwazi, Aine Davis, Alexanda Kotey, and El Shafee Elsheikh were four London-raised men who traveled to join the ISIS. They became infamous for their presence in ISIS beheading videos, during which they killed at least 27... Read more

Thomas Robb is an Christian Identity preacher who has led the Knights Party (also known as the Knights of the Ku Klux Klan), an Arkansas-based Klan group, since 1989. Robb specializes in using the media to try... Read more

Thomas Stockheimer was an anti-government extremist and prominent Posse Comitatus leader in Wisconsin in the 1970s and 80s. He was also involved in an assault on an IRS agent in the 1970s as part of the tax... Read more

Timothy McVeigh was an American domestic terrorist who detonated a truck bomb in front of the Murrah Federal Building in Oklahoma City on April 19, 1995. The blast destroyed the building, killing 168 men, women and children... Read more

Tom Sunic is a Croatian-born, longstanding American white supremacist, involved in a number of American white supremacist groups, including the American Freedom Party.

Umar Farouk Abdulmutallab, also known as "the Underwear bomber," is a Nigerian-born terrorist who unsuccessfully attempted to bring down an airplane flying from Amsterdam in the Netherlands to Detroit, Michigan, on December 25, 2009, using a bomb... Read more