i don't know what it's worth to the debate, but i witnessed the first plane's collision with the north tower from spring street between hudson and greenwich. i was facing south with a direct line of site to the north tower, and the plane came over us at extremely low altitude. as i remember it, pretty vividly, the plane came in low, swooping up into the tower. at least from my perspective it appeared to be on an upward trajectory, left wing banking down, into the building
it's surprising to read about a downward trajectory because that contradicts what i remember seeing. i just called the person i was with. without indicating how i recall it, i asked how she recalls the trajectory of the plane from each axis, and she voluntarily described the same thing, specifically recalling it swooping up into the building