Testimony

http://docs.house.gov/meetings/HM/HM05/20170228/105637/HHRG-115-HM05-Wstate-BergenP-20170228.pdf

http://www.hsgac.senate.gov/hearings/lessons-from-the-paris-terrorist-attacks-ramifications-for-the-homeland-and-refugee-resettlement

http://newamerica.net/sites/newamerica.net/files/profiles/attachments/Bergen_Testimony_HFAC_AfPAk.pdf

http://www.judiciary.senate.gov/pdf/04-23-13BergenTestimony.pdf

www.gpo.gov/fdsys/pkg/CHRG…/pdf/CHRG-112hhrg67395.pdf

http://counterterrorism.newamerica.net/publications/resources/2011/threats_to_the_american_homeland_an_assessment

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