http://www.foreign.senate.gov/imo/media/doc/Bergen_testimony.pdf
www.gpo.gov/fdsys/pkg/CHRG…/html/CHRG-111hhrg66029.htm
www.gpo.gov/fdsys/pkg/CHRG…/html/CHRG-111hhrg55595.htm
http://counterterrorism.newamerica.net/publications/resources/2009/confronting_al_qaeda_understanding_the_threat_in_afghanistan_and_beyond
http://oversight.house.gov/wp-content/uploads/2012/02/20090304Bergen.pdf
http://www.gpo.gov/fdsys/pkg/CHRG-110hhrg46632/html/CHRG-110hhrg46632.htm
http://www.fas.org/irp/congress/2008_hr/040908bergen.pdf
http://democrats.foreignaffairs.house.gov/110/33319.pdf