Post-9/11 Evolution of the United States' Defining of the Terrorist Threat from Al Qaeda [January 20, 2015] [open pdf - 57KB]
"Since the terrorist attacks of September 11, 2001, Al Qaeda-related entities have increased in number and become more diffuse; with these changes there has been an evolution in how the United States defines the terrorist threat. How the threat has evolved could influence consideration of new authorities and policies in the 114th Congress."
CRS Insight, IN10214
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html