I myself am a little curious as to why so little hard information has been released on UA 93.
I also feel if it was shot down the gov't needs to state this and why- otherwise if it comes out later they will have lost a lot of credibility. Personally I feel the point is moot. They were doomed anyway- I also think the hijackers would not have given back control of the aircraft- certainly at that altitude the ability to cause a crash is magnified- no altitude for recovery period- especially by a non-pilot. If they were shot down- in a fashion it shows the system "worked". I don't know if I could do it- but imagine the difference if none of the A/C had hit their targets.
Based on the phone calls- the passengers died fighting- they are heroes.
Finally, I don't believe the A/C was lost- If an individual can control a heavy jet at high speed/low altitude, I suspect they can navigate. Clearly, the flight path shows they were headed for DC or maybe Three mIle Island.
Finally, I hope I don't sound callous- that is not my intent- my thoughts and prayers are with anybody who has been hurt by these horrendous unspeakable acts.