Yes. I remember very well President Bush saying these attacks will not change America. I wish I could find a quote.

One of the things it changed dramatically was air travel. Remember meeting family/friends at their arrival gate as they walked off the plane? Remember getting through "security" in a few minutes because the lines moved so fast?

In the 1980s and early 1990s, my father routinely disassembled pistols and put them in his checked luggage so he could target shoot at his destinations. Imagine doing that today.