Reports

Co-written with David Sterman. https://thesoufancenter.org/wp-content/uploads/2026/09/25-Years-After-911-The-Future-Of-The-Global-Jihadi-Movement.pdf

https://www.newamerica.org/international-security/reports/an-assessment-of-variation-in-national-processes-of-defining-and-designating-terrorist-groups/

https://www.newamerica.org/international-security/reports/terrorism-america-19-years-after-911/

https://www.newamerica.org/international-security/reports/terrorism-america-18-years-after-911/

https://www.newamerica.org/international-security/policy-papers/jihadist-terrorism-16-years-after-911-threat-assessment/

https://www.newamerica.org/international-security/policy-papers/jihadist-terrorism-15-years-after-911/

https://static.newamerica.org/attachments/11813-isis-in-the-west-2/ISP-Isis-In-The-West-v2.b4f2e9e3a7c94b9e9bd2a293bae2e759.pdf

http://www.newamerica.net/sites/newamerica.net/files/policydocs/Bergen_NAF_NSA%20Surveillance_1_0_0.pdf

http://bipartisanpolicy.org/library/report/jihadist-terrorism-threat-assessment

http://bipartisanpolicy.org/library/report/assessing-terrorist-threat