Why does the terrorist attack on September 11, 2001 impact on America today?

I speak for all americans when I say it is heartbreaking to know what happened that day. We were attacked, and innocent lives were lost, firefights crushed along with the 2,606 people that had families, and airports will never be the same again. It made us stronger though. Its just another event, along with millions others, the earth has been collecting on its shoulders for as long as we know. My point is this effected everybody on earth. No other location of earth needs to have that happen again ... and it wont! Salute.