This is truly amazing. I often wonder why air traffic control did not scramble some fighter jets when they saw all of these planes veering off their flight plan at the same time.
9-11 FLIGHT PATHS I have never seen this before. The two jets that hit the  World  Trade  Center actually crossed paths enroute.

Click on the arrows in the right column to the left of each flight. The one that shows them all in action is most interesting. It reveals how well the plan had been developed, barring departure delays.  I wonder if the original plan was to have them all strike their targets at the same time.

And they did it all with  U.S. aircraft,  U.S. flight schools, and a few box cutters. Click Below:

http://www.kerman94.com/911-Flights.HTM