spiderman?
seriously, could be anything, debris, insect pass in front of the camera, anything..... but no missile!!!
whatever it is, it comes from ABOVE the buildings. It clips the north towers causing a nice amount of fire and smoke, and lands on WTC6.
FOX and DRUDGE both reported it may have been a missile in the days after.
Really? An insect? Did you watch it in slow mo?