Dave's words sum it up...WingNWing has it right.
Having had the first plane fly over my head, questioning why it sounded so loud, and then hear it hit the first Tower, hours later meet folks walking away in a daze, covered with Trade Center dust on the streets of Manhattan, my thanks to Dave for explaining reality so well.
Sadly, our world is not what we may have enjoyed in the 50's and 60's. Wish we could "un-ring that bell" but that is no longer reality. I go through airports ever week and do the drill. I have nothing to hide and patience for the effort. Is it perfect???..no but what can you do but your best.
S/V Tango, CR 34
Lankford Bay Marina