That is why the plane taken down with a bomb over Scotland was at 30,000 plus feet when the bomb went off. The Bomb had an altimeter and electronics to only only explode it at 30 plus thousand feet. The bomb needs the high pressure in the plane and the low pressure outside to assist the bomb in breaking up the air plane.
Someone mentioned the possibility of a Thrust reverser coming down after air born as a possibility. That certainly would do it. the huge yaw would snap off the tail and yank off one of the engines. The plane would come straight down, nose first with the wreck confined to a small area.
A bomb would have had the plane going forward at a good speed and a half mile of Rockaway would be destroyed instead of 12 houses.
It terrorists brougt it down they did it with a missile. A terrorists flying a plane would have likely had enough training to know that crashing straigth down would do the smallest amount of damage.
I have missed your posts lately CT. I hope it is because you are extremely busy and not due to health problems.