Here is the code that shows the 9-11-01 Highjackers choice of planes and flight paths from thier destinations.
American Airlines flight 77 American Airlines flight 11
Dulles airport 8:20a.m Boston Logan airport 7:59
Hits Pentagon 9:40a.m Hits tower North at 8:45a.m.
United Airlines 175 United Airlines 93
Boston Logan airport 7:58 Newark Int. airport 8:01
Hits South tower at 9:05 "Crahses" stoney ceek,PA 10:10
AA11 1+1 =2 Hits North tower first
UA93 9+3=12 1+2=3 Nearly makes destination, Crashes last
UA175 1+7+5=13 1+3=4 Hits South tower third
AA77 7+7+14 1+5=5 Hits Pentagon last
It is more than likely that the highjackers did not pick flights out of random and that they coded the sequence of the flights and the sequence of the targeting for maximum effect and security of their plot. This way no one would have to actually speak and say " This is the way it is going to be done" . The interesting thing is that flight UA93 nearly made its destination before appearantly being highjacked, as if thier was dissention from the original plot or as if the opportunity to take the plane did not arrive as early as planned for, or as if they simply lost their nerve for a bit.
Given the encryptive sequence it is logical to assume that Flight UA93 was originally planned to hit the whitehouse -before the second tower hit - under the
assumption that a mass plot would not have yet been realized and the whitehouse would not have been evacuated. The same calculation saved the final plane for the Pentagon under the assumption that all personell would be called to active high alert and would either be at the building or on their way. Maximum suffeciency!