Never forgetting is one thing but the need to move on is something greater. Living in the past won't help things. From the history books the French lived in the past at the start of WWII thinking warfare was the same as it was in WWI. Well we all know living in the past didn't help the French and living in the past dwelling on 9-11 all these years later won't help the USA either. So many other counties in the world have to deal with terrorism on a much greater basis than the US yet they all seem to have the ability to move on and go forward.