Subgroups of 9-11 plotters
| Affiliate/Subgroup | Scope | Center of Gravity | |
 American Airlines Flight 11 Hijackers | Local | Boston, Massachusetts, United States | |
| American Airlines Flight 77 Hijackers | Local | Washington, DC, United States | |
| Hamburg Cell | International | Germany | |
| United Airlines Flight 175 Hijackers | Local | Boston, Massachusetts, United States | |
| United Airlines Flight 93 Hijackers | Local | Newark, New Jersey, United States |
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