There was another FR psoter who sent me the sequence. When comparing it to the sequence on my site, I was and remain convinced that what is on my site is debris related to the crash.
In addition, if aother object was moving at 5-6 times the speed of the aircraft, that would put it in the Mach 3 range and at that altitude the shockwave associated with it would in itself be destructive.
Not to mention that any NORMAL aircraft would have slammed into the ground, as normal aircraft would never be able to pull up in time.
HOWEVER, take a look at the video. It speaks for itself..
The video is on the Fox Multimedia Archive: Terrorism Hits America page. From there, click on the video listed as 9/11/01: East Angle - Second Plane Hits Tower. About halfway through the video, you'll see the object pass from behind WTC1 to the right hand bottom of the screen...