| Direct Associations |
|---|
| Name | Relationship | Link(s) | Earliest
Associated |
|---|
 Mohamed Atta | Supervisor | 9-11 plotters
9-11 plotters
Hamburg Cell
Three Hamburg cell members live together
Al-Shehhi rejoins Atta and Binalshibh in Hamburg
Hamburg Cell in Afghanistan
Atta and Shehhi visit Oklahoma flight school
Atta and Shehhi attend Florida flight school
Atta and Shehhi enroll at another aviation school
Atta and Shehhi return to Huffman pilot school
Atta and Shehhi in Norcross
Atta and Shehhi in Decatur
Atta and Shehhi in Lawrenceville
Atta and Shehhi arrive in Virginia Beach
Atta and Shehhi go to Stone Mountain
Atta in Virginia Beach
Atta in Coral Springs
Atta and Shehhi at hotel
Al-Shehhi calls Atta
9-11
| April 1998 |
 Mohammed Haydar Zammar | Associate | | 1998 |
| Fayez Bannihammad | Same Group | United Airlines Flight 175 Hijackers
UA 175 takes off
9-11
UA 175 hijacked
UA 175 crashes into WTC South Tower
| Sept. 11, 2001 |
| Mohand al-Shehri | Same Group | United Airlines Flight 175 Hijackers
UA 175 takes off
9-11
UA 175 hijacked
UA 175 crashes into WTC South Tower
| Sept. 11, 2001 |
| Ahmed al-Ghamdi | Same Group | United Airlines Flight 175 Hijackers
UA 175 takes off
9-11
UA 175 hijacked
UA 175 crashes into WTC South Tower
| Sept. 11, 2001 |
| Hamza al-Ghamdi | Same Group | United Airlines Flight 175 Hijackers
UA 175 takes off
9-11
UA 175 hijacked
UA 175 crashes into WTC South Tower
| Sept. 11, 2001 |
| Khalid Shaikh Mohammed | Same Group | 9-11 plotters
Shehhi meets KSM
9-11
| Early December 1999 |
| Ramzi Binalshibh | Same Group | 9-11 plotters
Hamburg Cell
Three Hamburg cell members live together
Binalshibh and Shehhi meet Khalid al Masri
Al-Shehhi rejoins Atta and Binalshibh in Hamburg
Slahi meets with Hamburg Cell
9-11
| April 1998 |
| Mustafa Ahmed al-Hawsawi | Same Group | 9-11 plotters
9-11
| |
| Ali Abdulaziz Ali | Same Group | 9-11 plotters
Ali Abdulaziz Ali orders aircraft material
9-11
| Early January 2000 |
| Mohammed Atef | Same Group | 9-11 plotters
9-11
| |
| Ziad Jarrah | Same Group | Hamburg Cell
Slahi meets with Hamburg Cell
Hamburg Cell in Afghanistan
9-11
| October 1999 |
| Said Bahaji | Same Group | Hamburg Cell
| |
| Zakariya Essabar | Same Group | Hamburg Cell
| |
| Khalid al Masri | Same Event | Binalshibh and Shehhi meet Khalid al Masri
| 1999 |
| Mohamedou Ould Slahi | Same Event | Slahi meets with Hamburg Cell
| October 1999 |
 Abdelghani Mzoudi | Same Event | Shehhi goes to Morocco
| Mid January 2001 |
| Indirect Associations |
|---|
| Osama bin Laden | Indirect | 9-11
| Sept. 11, 2001 |
| Nawaf al-Hazmi | Indirect | 9-11
| Sept. 11, 2001 |
| Khalid al-Mihdhar | Indirect | 9-11
| Sept. 11, 2001 |
| Hani Hanjour | Indirect | 9-11
| Sept. 11, 2001 |
| Abdul Aziz al Omari | Indirect | 9-11
| Sept. 11, 2001 |
| Satam al Suqami | Indirect | 9-11
| Sept. 11, 2001 |
| Wail al-Shehri | Indirect | 9-11
| Sept. 11, 2001 |
| Waleed al-Shehri | Indirect | 9-11
| Sept. 11, 2001 |
| Majed Moqed | Indirect | 9-11
| Sept. 11, 2001 |
| Salem al-Hazmi | Indirect | 9-11
| Sept. 11, 2001 |
| Saeed al-Ghamdi | Indirect | 9-11
| Sept. 11, 2001 |
| Ahmed al-Nami | Indirect | 9-11
| Sept. 11, 2001 |
| Ahmed al-Haznawi | Indirect | 9-11
| Sept. 11, 2001 |
| Tawfiq bin Attash | Indirect | 9-11
| Sept. 11, 2001 |
| Abu Turab al Urdani | Indirect | 9-11
| Sept. 11, 2001 |
| Direct Associations describe relationships in which the two are believed to have had a personal relationship. Indirect associations are those who are connected through an event or group, but it is not established in sources that they ever had direct contact. |
