BS! I too, at one time, felt that perhaps the flight was shot down... until about a week or so ago when CNN showed previously unreleased fottage of the smoke billowing up from the ground after the crash. There were no trails of smoke leading down to the ground. The fact that there was almost nothing left of the plane seems to indicate a high speed ground impact.
Why even give credibilty to this twaddle?
The answer to your question is simple. It might have happened that way. Why on earth would it be hard to believe that the government, knowing what was happening and knowing that the White House might be the next target, would do anything to bring that plane down? The bigger question is, why don't they have the decency....and the honor to tell the truth? The answer is that it would not be politically prudent to do so. And if this scenario is true....then this is the greatest danger facing America.