That is why the first hit was made by a guided missile.<quoted text>
The wing span of a 757 is about 165 ft. The facade of the towers was about 210 ft. The planes hit almost dead center. That means the pilots would have had to adjust the flight path of the plane at precisely the right heading at a great distance before impact based simply on their eyesight because traveling at about 450mph there would be no time to make fine adjustments upon approach.
The chances of hitting it with that kind of precision would be like trying to put a basketball through a hoop across the length of a football field.