This 2002 article is intriguing to view as a study of sociology and criminology shortly following one of the largest terrorist acts of the 21st century. While it is dated it still serves as an effective reminder of a nation at the height of the terrorist fear in the midst of an attack and how the psychology of terrorism affected groups.
Another article that focuses exclusively on modern terrorism in the world in relation to terrorist groups such as Al-Qaeda and how they have in a sense accomplished their goals of disrupting established governmental proceedings (example - United States air system etc)
https://www.youtube.com/watch?v=cb7ArmbIYIY
The video details the psychological aspects of terrorism and tactics that terrorists tend to use in order to have their needs met - despite them sociologically and ultimately being useless. This video serves as an effective crash course on terror research and how group behavior is studied through terror methods.
http://www.un.org/en/terrorism/
The first website is the national effort against terrorist efforts and demonstrates a sort of mob mentality, us versus them perspective to various social groups fighting over the means of obtaining social gratification of goals.
http://www.fbi.gov/about-us/investigate/terrorism
The second site is again a government run objective based perspective of terrorism in order to portray the intensity and severity of terrorism modernly. The measures actively taken and the dedication of bureaucratic social groups exhibits the class separation between those who align with deviant groups.