PENTTBOM is the code-name for the FBI investigation into the September 11, 2001 attacks on New York and Washington, D.C, the largest criminal investigation in U.S. history. Its name stands for 'Pentagon/Twin Towers Bombing Investigation'. The investigation was launched on September 11, 2001 and involved 7000 of the 11000 Special Agents of the FBI [1]. The Federal Bureau of Investigation (FBI) is a Federal police force which is the principal investigative arm of the United States Department of Justice (DOJ). ... The explosion resulting from the crashing of United Airlines Flight 175 into the South Tower. ... The Federal Bureau of Investigation (FBI) is a Federal police force which is the principal investigative arm of the United States Department of Justice (DOJ). ...

Congressional testimony indicates that the FBI was able to identify the 19 hijackers within a matter of days as few suspects made any effort to conceal their names on flight, credit card, and other records.[2]. Additionally three of the hijackers carried an identical handwritten letter (in Arabic) that was found in three separate locations: the first, in a suitcase of hijacker Mohammed Atta which did not make the connection to American Airlines Flight #11 that crashed into the North Tower of the World Trade Center; the second, in a vehicle parked at Dulles International Airport belonging to hijacker Nawaf Alhazmi; and the third at the crash site in Pennsylvania. Translations of the letter indicate an alarming willingness to die on the part of the hijackers[3]. Mohammed Atta is a name commonly used to refer to the following individuals: Mohamed Atta al Sayed was the Al-Qaeda suicide pilot of the first plane to crash into the World Trade Center during the September 11, 2001 terrorist attacks. ...

Press Releases related to Investigation

11 September 2001 FBI opens PENTTBOM investigation[4]

14 September 2001 FBI releases list of 9-11 hijacker suspects [5]

27 September 2001 FBI releases photographs of 9-11 hijacker suspects [6]

28 September 2001 FBI releases 4 page letter believed written by hijackers [7]

4 October 2001 FBI releases partial timeline for Boston-based hijackers [8]

External links

• FBI's 9/11 Team Still Hard at Work from the Washington Post
• FBI PENTTBOM suspects
• Translation of hijacker letters