It's a pretty simplistic viewpoint to think that nothing should have been done to amp of security and the problem would just take care of itself after the trage

It's a pretty simplistic viewpoint to think that nothing should have been done to amp of security and the problem would just take care of itself after the tragedy of 9/11. Yes, maybe the exact same plan wouldn't work again, but downing a plane would take far less compliance by the other passengers than running it into a building.