[Alas Babylon!]

That red line was superimposed on the frame by Drudge or the folks from Gamma Press. Take out the red line and I'd say it means nothing. Since it's video tape, not a photo, it could be a bird, a smudge on the lens, something smoking that fell out of the first hit tower, or a telephone pole, clothes line, or flag pole off of a closer (but out of focus) building.

[surfer]

Well Matt's description is up and the interesting point is he makes is :

A close examination of the footage appears to first show the object flashed by sunlight -- above the left tower -- a full 10 seconds after impact of the second airliner. The mystery object quickly streeks across the the back of the right tower before swooping down at a rapid clip and out of the camera's frame.

[rintense]

Yep. Drudge is full of it this time. Plus, the position of the red line has nothing to do with the second impact whatsoever. Drudge has lost it.

[Alberta's Child]

The red line is a pretty idiotic thing to add to the photo. You have to remember that the first building was largely intact when the second plane hit, even though it was burning out of control. Does anyone really believe that a projectile could go through the first building at that angle and come out the other side relatively intact? Besides going through the horizontal width building, it looks like it would have had to pass through about 15-20 floors vertically, too.