The goal of terrorism is not only to inflict death and mayhem but to also inflict fear and change, on that day they achieved those goals and the fallout is ever present even today. History does indeed repeat time and time again so if we do not want another event to happen it would behoove us to stay vigilant in ourselves but not to the extent that we find ourselves giving up every single freedom that so many have worked tirelessly for or given their lives for, there must be balance.
Terri over on her site has a few things also on this day so please if you have a moment drop in.