It has been widely reported that "Able Danger" managed to identify the "Brooklyn cell" in January, February 2000. This cell includes 9/11 ringleader Mohamed Atta, and three other 9/11 hijackers: Marwan Alshehhi, Khalid Almihdhar, and Nawaf Alhazmi.
http://www.nytimes.com/2005/08/09/politics/09intel.html?ex=1137560400&en=c3ffd39f832b546d&ei=5070http://www.foxnews.com/story/0,2933,166504,00.htmlhttp://www.washtimes.com/op-ed/20050821-103902-5531r.htmhttp://www.gsnmagazine.com/sep_05/shaffer_interview.htmlSo the really tough question is not so much the often discussed issued why the information wasn't passed but a much simpler one:
Atta entered the US on June 3, 2000.
http://intelligence.senate.gov/0209hrg/020926/witness.htmAlshehhi entered the US on May 29, 2000.
http://intelligence.senate.gov/0209hrg/020926/witness.htmAlmihdhar had entered the US on January 15, 2000 already
http://intelligence.senate.gov/0209hrg/020926/witness.htmbut he stayed in San Diego until summer 2000.
(Commission Report)
Nawaf Alhazmi also entered the US on January 15, 2000.
http://intelligence.senate.gov/0209hrg/020926/witness.htmBut he also remained in San Diego.
In March he travelled to Arizona.
http://intelligence.senate.gov/0209hrg/020926/witness.htmNow here is the question:
How come Able Danger managed to identify four future hijacker in Brooklyn although two hijackers lived at that time in San Diego and two others still in Germany?