Tony Bowden from Tallinn, Estonia / This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or less.

Airs Tuesday, August 30, at 7:45 p.m.  This week Dr. Gary Joiner takes an historic look at terrorism

Dr. Gary Joiner / Dr. Gary Joiner

On this 9/11 anniversary, commentator Gary Joiner explores the historical roots of terroristic activity.