The cockpit voice recording of Flight 93 was recorded on a 30-minute reel, which means that the tape is continually overwritten and only the final 30 minutes of any flight would be recorded. The government later permits relatives to hear this tape. Apparently, the version of the tape played to the family members begins at 9:31 a.m. and runs for 31 minutes, ending one minute before, according to the government, the plane crashes. [Longman, 2002, pp. 206-207; CNN, 4/19/2002] The New York Observer comments, “Some of the relatives are keen to find out why, at the peak of this struggle, the tape suddenly stops recording voices and all that is heard in the last 60 seconds or so is engine noise. Had the tape been tampered with?”
[New York Observer, 6/20/2004]


