1) manipulation: Of course we did what they wanted us to do....note previous observation of plunge in flight reservations.....they won, we lost....I am going to grossly exaggerate, but....it was very effective from their point: crash 4 planes, effect billions of billions of people: their collatral damage/ Less than 20/Our human damage...3000?/ their cash outflow...very little...compared to our cost in clean up and lose of economic stability.....again billions...their cost in psychological damage...i am not sure but I bet very little considering the mind set....our psychological damage....hahah stand in line at an airport line for hours/hours...to get the illusion of safety:)
They won and are winning now....