some of the most extreme elements such as the unabomber ted kaczynski, the advocate the collapse of technological civilization. the echo extremist had been responsible for a considerable amount of property damage. though not many fatalities. there are indications, however, that some people in the movement have adopted a more apocalyptic and -- as a consequence they could be inclined to wage lethal attacks in the future. since the 1990s the fbi has identified ago extremists as a very series domestic terrorism threat. -- echo extremist. jeffrey ross export extremism in american prisons. berries politically expedient get tough approach have resulted in chronically overcrowded prisons. and prisons are often incubators of extremism for august recess. of violent and harsh element. the 1960s and 1970s were really the formative years or the development of prison gangs. around that time the prison population was desegregated and this diminished the stable prison culture that had prevailed for many years. it really contribute to a polarization between the various racial and ethnic groups in prison. so a wi

i worked on the unabomber case. i worked on the jaycee dugard case. i worked on gary ridgway, the green river murder case. >> now she delves into the mind of james dusty rhoedes, who is serving four consecutive life sentences for murder, attempted murder, kidnapping and sexual battery. >> at the time that dusty was out and walking the streets, he was extremely dangerous. he was lethal. he was absolutely lethal. on a scale of one to five, you definitely have to put dusty at a five. >> i'm military trained. if i want to hurt you, i can do this in a matter of seconds. >> the look that he gave me was actually chilling. when you hear the term, the hair goes up on the back of your neck, it went up on the back of my neck. >> a person should be able to feel safe to do as they please. but the reality is, everywhere you go, there is somebody out there. i think that most people who become victims become victims because they are not aware of just how easy they are or vulnerable they are to attack. they feel comfortable in their environment, and they should. but t