The Pentagon Flight Path Misinformation, Stand-Down, War Games, and the Three Mysterious Planes
By Arabesque
Many 9/11 researchers including even Jim Hoffman and Pentagon research have made reference to a flight path map of alleged flight 77 by Former Air Force Pilot Steve Koeppel.[1] 
Unfortunately, this map is wrong. Any doubt of this fact has been removed in an excellent research piece by Caustic Logic:“More people had fallen for [this map] at some point (besides me, not that I even looked close until now): Jim Hoffman at one point used Koeppel’s map to illustrate a ‘Spiral Attack Maneuver Avoids Top Brass.’”[2]
As indicated on the map below, there is no way that the plane could have approached from the north without radically altering its flight path from the east.[3]
In other words, the plane would have had to flown in an incredibly impractical direction before the approach as seen in Koeppel’s flight path map.
Koeppel relied on a single, error filled source as Caustic Logic explains: 
“As an ill-fated aside before explaining his sources, Koeppel pointed out “what’s surprising is how many news sources got the information wrong. For example, look at this graphic from Reuters, which has the attack on the wrong side of the Pentagon:”[4]
“[Below] is the graphic he used, labeled “The Pentagon Attack” and featuring a six-point timeline of events, along with a grossly incorrect impact point shown. What’s at least as surprising, in my opinion, is where Koeppel explains
These days, Donald Buswell’s job is not as exciting or dangerous as it once was. For the past few months, his working hours have been spent taking care of some 40-plus wounded soldiers at San Antonio’s Fort Sam Houston medical center. The work is sometimes menial, even janitorial, but he doesn’t mind. After all, Buswell has been where these men are — three years ago, he too was recovering from wounds received in a battle zone in Iraq.