Usually the NTSB will issue a report for all planes that crash in the U.S. However, this is what they say about the four 9/11 flights:
The terrorist attacks of September 11, 2001 are under the jurisdiction of the Federal Bureau of Investigation. The Safety Board provided requested technical assistance to the FBI, and this material generated by the NTSB is under the control of the FBI.
The Safety Board does not plan to issue a report or open a public docket.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The Safety Board did not determine the probable cause and does not plan to issue a report or open a public docket. The terrorist attacks of September 11, 2001 are under the jurisdiction of the Federal Bureau of Investigation. The Safety Board provided requested technical assistance to the FBI, and
any material generated by the NTSB is under the control of the FBI.
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NTSB 2001 Index Consistent with a government cover-up!
