Evaluating CIT's Flyover Theory

CIT attempts to sell the Pentagon flyover theory:

A major misconception regarding the Pentagon attack is that hundreds and hundreds of people in the area would be able to see the entire event go down, including the alleged "impact". This is not the case, primarily due to the complex topography. In fact there are very few areas at all where you would be able to see the alleged "impact", and most who would be able to see the plane at all would only see it for about a split second. The flyover would be concealed by the massive fireball and smoke plume as it banked upriver disguised as normal flight traffic out of Reagan, which you can see regularly in the area as seen in this footage.
http://www.citizeninvestigationteam.com/morevideos.html

In fact, the fireball and smoke would conceal the plane for observers in ONLY a narrow wedge west of the Pentagon

See Google Earth Exposes Pentagon Flyover Farce

The entire alleged flyover would be clearly visible from:

• About a mile of the 6- to 8-lane I-375 snaking around the the Pentagon's south side
• About 2000 feet of the 6-lane VA27 to the north and 1000 feet to the south of the Pentagon
• Portions of the 6-lane VA100 that runs east of the Pentagon
• Various roads flanking these major highways
• Thousands of glass-walled rooms and offices in Pentagon City and elsewhere starting about 2000 feet from the Pentagon

Given heavy traffic conditions at the time of the attack, somewhere between 500 and several thousand people, alerted by the sound of the explosion, would have clearly seen the alleged overflight