Williams "was concerned by the flight students' affiliation with Sheik Omar Bakri Mohammed's group because the sheik had been involved with a fatwa -- an Islamic call to action -- that suggested airports as one of several legitimate attack targets in the United States, officials told The Associated Press. 
"In addition, Williams' memo had identified another Muslim figure in Arizona -- who was not training at aviation schools but was linked through phone communications to one of Osama bin Laden's top lieutenants, Abu Zubaydah, the officials said, speaking only on condition of anonymity. 
"The agent spent extensive time trying to link that man to one of the students, but never succeeded, officials said." 
- 9-11 Truth Movement links to other 9/11 investigation pages
- August 6, 2001, President's Daily Briefing Memo
- "The Phoenix Memo," The Memory Hole: "The 9/11 report from the joint intelligence committee investigation contains a reproduction of the FBI's infamous 'Phoenix Memo'. Excerpts from this unheeded warning about Islamic terrorists training at US flight schools had previously made their way to the public, but this marks the first time it has been seen in its entirety (albeit with portions redacted by black marker)." See full Congress' 9/11 Report.
- Oliver Burkeman, "Bin Laden named in overlooked FBI memo," The Guardian, May 16, 2002.
- "Senators question 'Phoenix memo' author,", CNN, May 21, 2002.
- FBI's "Phoenix" Memo Unmasked, BuzzFlash, May 24, 2002.