Great question!
The fact that you are even asking it is indicative of 2 things...
1. Your noggin is working over-time now that you've realized that you lost the "math" debate.
2. Despite your daily obsession with ridiculing CIT you really haven't paid much attention to what they have said or the evidence they present as this has been addressed quite thoroughly.
CIT has uncovered a significant amount of evidence for a deliberately planned 2nd plane cover story.
See presentation
here.
The gist of it is that the decoy jet was meant to fool most people into believing that it hit the building but the 2nd plane cover story would be out there as an explanation for the people who actually saw it fly over or away from the building.
So it would be close enough to the damage to fool people but also a bit off track to more easily be written off as a "2nd plane".
Stories of a "2nd plane" shadowing it and flying away at the time of the explosion were floated in the media and reinforced with a few planted witnesses. We know for a fact there was no "shadowing" plane but we also know that a few dubious accounts and media reports quite explicitly floated this notion within the first days of the event.
This originally came mostly from a series of articles written by Terry Scanlon for the Daily Press about the C-130. If you read them it's clear that he deliberately has the plane in the airspace
at the same time as the explosion but of course we know from the Tribby video and the ANC witnesses that it wasn't there for about 3 minutes later.
Of course this is finally confirmed by the pilot Lt Col Steve O'Brien's statement that he was too far away when he first saw the explosion to even be able to tell if it was coming from the Pentagon!
"I distinctly remember having a difficult time keeping the AA flight in sight after we turned back to the east to follow it per a request from Wash. Departure Control. When I saw the initial explosion I was not able to see exactly where or what it had impacted, but remember trying to approximate a position to give to ATC. It was then that I was able to see the sun reflecting off the Potomac and the runway at Wash. Nat'l and thought to myself that the AA flight must have had some sort of IFE (in flight emergency) and was trying to make it back to National Airport."
-Lt Col Steve O'Brien
The Pentagon is massive compared to a commercial airliner. Obviously he was too far away to see an impact or flyover but virtually ALL media reports erroneously either imply or flat out state that he did witness an impact. By the time he turned around to try and "follow it" it was too late.
But the 2nd plane cover story was very ambiguous at first and not limited to false reports of the C-130.
Indeed talk of any "mystery plane" at all in the skies would ambiguously serve as cover to anyone who saw the plane flying away.
That's why even talk of the E4B would be effective in this regard and now of course we know that proven dishonest conspiracy theorists like 911files blatantly used it for this very purpose only a few months ago in
Gaffney's book.
So the planners obviously wanted complete control of the damage to their own building and clearly this would be achieved most efficiently with pre-planted explosives. This is the obvious reason why they would "fake" the damage. The plane was a psychological tool and while most believed it hit the building, others were quite deliberately fooled into thinking it was a "2nd plane". Roosevelt Roberts Jr. is a prime example.