Why should I remember 9/11?

Nine years ago, people's lives in the USA and around the world had changed. We have grown up in a era of wonderful cars, Television, Radio, and so much ease technologically wise. My generation had never heard about a war on our land. Well, scratch that..we had heard of it. It happened before. They taught it to us in History class. Pearl Harbor, the day that lived in infamy. December the 7th in the year 1941. We know from the movie we saw how tragic it was. We had been attacked for the first time that year on our American Soil, then a few months shy of 60 years later, it happened again. We remember it well. It is in our minds exactly what we were doing that day, for the most part. When I say for the most part, I will explain. My thoughts are a bit scattered and I'm not writing properly because the question that I saw deserves a bit of answering and maybe others will see. Why is it so important to remember September 11, 2001. Sure, it was a bad thing for a handful of lunatics to kill so many innocent people. To hijack a plane and destroy the lives. But, why should I always remember? That was the question I saw. Of course, its paraphrased but that's the general jest of it.
As I wipe the sleep out of my eyes, I remember that day so well 9 years ago. I cried as I watched the TV with my cousin. I remember driving to her house after class because for some reason, I knew I had to be with Samantha. I turned on my radio and heard it on every channel. The Twin Towers have been attacked, a plane has crashed into the first tower. Planes have been hijacked. I was shocked, I was stunned, I didn't know what to think. In that moment, I felt that our county was incredibly vulnerable, it wasn't safe. I remember when I got to her house, I knocked on the door and she was like OMG have you heard the news? I was like yes, I just had to come and be with you. We watched the TV, went outside and smoked, we cried, we didn't leave the doors unlocked. It was a horrible feeling. A feeling of, what else are they going to do now? What else is going to happen? Are they going to attack other places too? The tears we cried as we watched those people jumping out of the building, to their death because they had no other way to get out but they didn't want to be in there. Yes, they perished at the end of the jump but they were scared. From what I remember, most people's emotions were running so high that day. Everything ranged from a feeling fear, sadness, unknowing what was happening. Those attacks that we witnessed are deep in my mind because of those overwhelming feelings. To answer the question, why should you remember that day? Well, the answer to me is quite simple. That was the first time in my life that I had ever witnessed an attack so bold, so horrible, so...sick in my life. To take so many human lives.....for no other reason that just pure hatred and malice. I can recall what I was doing that day, how I felt, and remember my 19 year old self crying over it. So, why should you remember? So those people would not have died in vein. So we can remember our history and hopefully find a way where it would never happen again so our children won't see such a heinous attack on our soil so that they will never know that type of pain. It made me realize that we weren't completely immune to such an attack. It could happen again, and I pray to God that it doesn't. I haven't forgotten and neither have a lot of people. I guess my question after remembering that day just like it was yesterday is: Why not remember?
Things happen that are bad all over the world, I realize that and I'm not saying that we shouldn't remember that. But, that day is a day that should stick out in our minds that we aren't as invulnerable as we had thought. Maybe I am hoping for too much for peace and the hope that it won't ever happen again. Its happened twice in the last hundred years, pray that it won't happen again.
That's all I've got to really say about it....