My daughter worked in thes Sear's Tower (thank goodness the company moved her divison to another building,earlier this year),so I do know how you feel.The ST has always been on the "target list".
I used to work in the Arco Towers in downtown LA, years ago. That area is in the heart of what one might call the financial district of LA.....tons of major banks.
I can't tell you the eerie feeling the folks on the plane near me experienced. Everyone just stopped talking until the plane turned.
I did not stop looking for anyone of Arab descent until that stinking plane started turned left...finally.