They planned it in the 1960's, they could have, and most likely conducted this same tactic on 9/11. Flight radar data proves this, without a doubt. WHich mean:

1.) The planes that allegedly departed that day, WERE NOT, the planes that hit the facades of the Buildings.

2.) The planes that allegedly departed that day. were switched in midair for reinforced remote-controleld drones made to look like passenger jets.

3.) They were flown into secure computer rooms with beacons.

4.) Either all the alleged passengers were killed at sometime, on some undisclosed military base OR, they were paid off and part of the ruse from the very begining; given huge sums of money to shut their mouths.

The latter has more evidence than all the other arguments.