about the plane hitting the Pentagon:
there are NUMEROUS conspiracy theroies about this now...including this:
"We now know Flight 77 was not crashed into the Pentagon.
An F-16 flew over the Boeing 757 for a while, and then the airliner was diverted with transponder off, flown by remote control to either
crash site or a landing site known only to the 911 perpetrators. Passengers and crew may be alive or may have been alive as captives some days following September 11.... From now on the passengers of
flight 77 must be considered possible kidnap victims." (The writer goes on to almost accuse Hillary Clinton of the murders of Nicole Brown & Ron Goldman!)http://www.apfn.org/apfn/not_crashed.htm

There are images from a security camera which show the plane briefly. I saw them on television shortly after the event. The camera was not a video camera,it took only a picture every couple of seconds, so there is no sequence. Critics want to claim the pics are blurry, the hole in the Pentagon does not 'match' what a 757 would make and it could have been a missle or small plane..etc..etc.....
I would be VERY careful before susbscribing to one of those theories put forth by people who didn't DO the site investigation and have no idea what happens to a 757 hitting a solid structure at 500 MPH.

Many people saw the plane approach and hit, and many small pieces of airplane were found....and Flight 77 and 64 passengers are missing. These facts are more compelling to me than a bunch of Gerrymandered 'facts' assembled by conspiracy hobbyests with too much time on their hands.