I swore to myself that I would stay clear of this topic, but I was reading through an old National Geographic over the holidays and came across this picture in the July 2002 publication. The source in the magazine pointed me to spaceimaging.com, where I've linked this picture from.
Just some observations I want to make...The pentagrass is green and untouched, but on the other side of the street. And this is the first time I've seen a picture posted here with two (2) holes punched through the sides of the pentagon, not one like the flash animation shows. To me it looks pretty obvious that a plane struck the side of the building and pretty much disentegrated while the 2 very dense engines punched all the way through.