I think we're on to something now. A ground based laser located in WTC 7 focused the beam off of a cloaked aircraft.
First, they destroyed the Twin Towers. Then, when the aircraft was directly overhead, they fired the beam at themselves in WTC 7, destroying all the evidence that the laser ever existed.
The diesel fuel was in WTC 7 in order to fuel the generators that powered the laser, and was later used to create the fires, thus making WTC 7 appear to collapse from fire (and structural damage from the collapsing tower).
Any flaws in that theory, chipmunk?