Flight 77, the supposed plane that hit the Pentagon on 9/11 was a Boeing 757. It is the same plane that President Trump flies in.
A Boeing 757 uses one of 2 different engines: Either a Rolls-Royce RB211 or a Pratt & Whitney PW2000
Here is a diagram of a Rolls-Royce RB211. It says the opening of the turbine of a RB211 is 84.8 inches in diameter. (7 feet)
https://ars.els-cdn.com/content/image/3-s2.0-B0122274105003562-gr7.jpg
Here is a photo of President Trumps plane (757), look at the size of the opening of the plane turbine and the person standing next to the plane. Look at the center hub of the turbine, compare its size to the person standing next to the plane.
Here is a photo from the Pentagon on 9/11. Look at the round object behind the person on the left. That is the center hub of a turbine from the object that hit the Pentagon. Notice anything wrong?
Who in the world said anything about being precise to within a few feet? Being within 10-20 feet at the start of a glide slope would be adequate. You have an exaggerated sense of what was adequate. Lining up on the target and aiming at the foundation footing was enough to get it there.
No time or patience or interest in flight simulators, but a friend once allowed me to fly his light Cessna on the straight and level. That part was not particularly hard, but I was quite disoriented by all the scenery I could see from the air that I was unaware of on the ground. It made landmark recognition difficult. (This would be less of a problem for something like the Pentagon, which was unmistakable and set apart from any confusing surface features.)
What is so humorous about clipping a streetlight? It only proves that the airplane was not flying at "zero" altitude (which would have been a belly slide all the way in). Let me remind you again that it doesn't take much skill to be unable to defeat the ground effect that was keeping the airplane buoyant.
You know, we have this conceit that the 9/11 air pirates were know-nothings and were miserably under-trained for what they were doing. But it just now occurs to me that perhaps they all came from a piloting background in their native lands, even ex-fighter pilots. Why would they take any training classes here? Maybe to learn our procedures, so as to do a better job when Showtime arrived? That would make events a bit more understandable.