It goes back to v important 1996 Khobar bombing incident. Considerable evidence pointed to Osama bin Laden and Al Qaeda (who were not nearly as well known then as now).
deseretnews.com/article/833096…
Drumroll..... none other than James Comey.
en.wikipedia.org/wiki/Khobar_To…
newyorker.com/magazine/2001/…
justice.gov/usao-edva/file…
reuters.com/article/us-sau…
cnn.com/2003/ALLPOLITI…
ipsnews.net/2009/06/exclus…
ipsnews.net/2009/06/exclus…
ipsnews.net/2009/06/exclus…
ipsnews.net/2009/06/exclus…
ipsnews.net/2009/06/exclus…