Because the tail section fell off first.
One should always be skeptical of government pronouncements which seem to be serving government's interest.
Within 30 minutes of the crash the FAA announced "no evidence of terrorist involvement." Do you find that suggestive of anything?
Years ago while driving home from Northeastern Univ In Boston one night, I drove by the morgue at Boston City Hospital. The ambulances were bringing in the bodies from a jet prop electra that had crashed into Boston Harbor because it ingested a flock of birds.
No doubt it happens. Logan(Boston) has trucks that consistantly drive around the outskirts of the airport and shoot at, and discourage the birds from gathering there.
How anyone can have a solid theory this early on what caused the crash is beyond me. - Tom