Nochmal zur Blackbox.
Wikipedia: United Airlines Flight 93"Black Box" recorders
The flight data recorder and cockpit voicerecorder were recovered on the afternoon of September 13, buried 25 feet (8 m) deep atthe impact site, but only transcripts have been released to the public. In April 2002, inan unprecedented action, the FBI allowed the relatives of the Flight 93 victims to listento the tapes from the cockpit voice recorder. Further details were released by the 9/11Commission in July 2004.