How has your life changed since 9/11? What are you doing after 9/11 that is substantially different than before 9/11?
You're baiting me, aren't you? You're hoping I will respond in detail, so that you can in turn respond by calling me paranoid. Well, my response is- none of your business!
If you're fool enough to believe that things haven't changed, since the 9/11 atrocity, then that's your business.