| Event Details |
|---|
 | Primary Organization | Al-Qaeda |
| Start | 1999 |
| Location | Federal Bureau of Investigation, 935 Pennsylvania Avenue NW, Washington, DC, United States |
|
| Narrative and Notes |
|---|
 | Possible | U.S. intelligence obtained information pointing to a threat to FBI headquarters in 1999.1 |
|
| Sources |
|---|
| 1The 9-11 Commission Report. July 22, 2004. Chapter 4. |
|
| Key to bullets |
|---|
| High confidence |
| Some confidence |
 Low confidence |
 No confidence |
| Page maintained by John Lumpkin
|
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