From 9/11 Encyclopedia:
Between May and September 2002, the complete story of FBI
Williams was totally ignored by US Congress:
On September 23rd, 2002 he spoke at the 9/11 -hearings hidden by a screen, but his identity was leaked again to the press.
"Williams wanted to prevent suspicious student pilot Habib Zacarias Moussaoui from flying a plane into the World Trade Center,
a congressional investigator testified Tuesday...
...The Phoenix-based agent, Kenneth Williams, wrote a memo to
his superiors in Washington two months before the
suggesting that terrorists might be learning to fly commercial jetliners at U.S. flight schools."
More absurde, on September 24th 2002 Reuters confirmed, that FBI officials in New York knew that several associates of Osama bin Laden had trained at U.S. flight schools, but believed the al Qaeda leader needed pilots to transport goods in Afghanistan, a congressional investigator said. http://www.reuters.com/news_article.jhtml?type=topnews&StoryID=1490622
At least three FBI agents in New York saw the Phoenix memo, but
told the joint inquiry they were aware that Middle Eastern men
frequently came to the United States for flight training because it
was considered the best and most reasonably priced.
...Two FBI agents from Oklahoma (->) visited Airman Flight School in Norman, Oklahoma on Aug. 23, 2001,
less than a month before the attacks to ask about Zacarias Moussaoui (->).
Compare: (-> Memos) May 20, 2002 "...The memorandum was sent
to counterterrorism offices in two cities
-- one copy went toJohn O'Neill (->), then the top counterterrorism agent in the F.B.I.'s New York office. http://www.nytimes.com/2002/05/21/national/21INQU.html "
...Months before an FBI agent here warned of extremists
attending U.S. flight
schools, anti-terrorism efforts in the Phoenix office had
virtually ground to a halt when a surveillance unit was disbanded
and agents assigned to counter-terrorism were diverted to an arson
according to current and former FBI agents... "If people only knew," said one agent who spoke on condition of anonymity.
"They think are really out there making progress, but they are not being allowed to do what they need to do."....
LINKS...Huffman Aviation - 9/11 Encyclopedia