The evolution of worldwide terror after 9/11

On the 13th anniversary of the Sept. 11, 2001 terror attacks, we look at how terrorism has changed over time.

Have its goals changed? How about its tactics? What about the language we use to talk about terrorism?

"Incidents such as the Oklahoma City bombing in 1995, the Fort Hood shooting in 2009, or the Oslo attacks earlier this year are likely to become the dominant strain of terrorism entering the next decade after 9/11, wrote Ken Sofer for The Center for American Progress. "While many would-be terrorists are inspired by the ideology of Al Qaeda and Anwar al Awlaki, as we have seen, lone-wolf terrorists can draw their inspiration from antigovernment or xenophobic ideologies as well."

Sofer joins The Daily Circuit along with Richard English, director of the Handa Centre for the Study of Terrorism and Political Violence at the University of St Andrews, United Kingdom, to discuss the changing face of worldwide terrorism.